{"title":"Cylinder Heads","description":"\u003cp\u003eShop high-performance cylinder heads designed to improve airflow, increase horsepower, and enhance overall engine efficiency. Engineered for street builds, restoration projects, and high-performance applications, these cylinder heads help optimize combustion and support stronger power output. Available in aluminum and cast iron designs for a wide range of engine platforms and build styles.\u003c\/p\u003e\n\u003c!--split--\u003e\n\u003cp\u003eCylinder heads are one of the most critical components in an engine, controlling airflow into and out of the combustion chamber. By managing the intake and exhaust flow, cylinder heads play a major role in determining engine performance, efficiency, and power output. High-performance cylinder heads are designed with improved port shapes, larger valves, and optimized combustion chambers to maximize airflow and combustion efficiency.\u003c\/p\u003e\n\u003cp\u003eUpgrading cylinder heads is one of the most effective ways to increase horsepower and torque. Performance heads improve air and fuel flow into the engine while allowing exhaust gases to exit more efficiently, resulting in better combustion and increased power. \u003c\/p\u003e\n\u003cp\u003eCylinder heads are available in both aluminum and cast iron designs. Aluminum heads are lighter and dissipate heat more efficiently, making them a popular choice for performance applications, while cast iron heads are known for durability and cost-effective replacements.\u003c\/p\u003e\n\u003cp\u003eCommon applications include small block and big block V8 engines, as well as modern LS and LT platforms. Whether you're building a high-performance engine or upgrading a factory setup, choosing the right cylinder heads is essential for maximizing airflow, improving efficiency, and achieving reliable horsepower gains.\u003c\/p\u003e\n\u003ch3\u003eShop Engine Components\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/camshafts\"\u003eCamshafts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/rocker-arms\"\u003eRocker Arms\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/timing-covers\"\u003eTiming Covers\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/valve-covers-and-breathers\"\u003eValve Covers \u0026amp; Breathers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Air \u0026amp; Fuel Components\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/intake-manifolds\"\u003eIntake Manifolds\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/collections\/fuel-injection\"\u003eFuel Injection Systems\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"chevy-big-block-aluminum-cylinder-head","title":"Chevy Big Block Aluminum Cylinder Head","description":"\u003cp\u003eIf you're looking to rebuild your old Big Block Chevy powerplant, you can't go wrong with a set of performance cylinder heads. TSP's heads are cast from premium aluminum for improved weight and heat management over the old iron. They are engineered and are not CNC-ported for maximum horsepower and torque.\u003c\/p\u003e\n\u003cp\u003eThis bare assembly is a great starting point for a performance engine build. It's designed for maximum flow and performance in the hands of a skilled builder or machine shop. It features a thick deck to help resist warping and comes with threaded bolt holes on the ends for an easy install.\u003c\/p\u003e\n\u003cp\u003eTSP cylinder heads are sold individually as bare assemblies. To achieve maximum performance, it is recommended that a licensed engine builder or machine shop coordinate matching short block and engine internals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003cbr\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Big Block Chevy engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, exhaust header, valve lift, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembled\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustion Chamber Style\u003c\/td\u003e\n\u003ctd\u003eHeart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustion Chamber Volume\u003c\/td\u003e\n\u003ctd\u003e124cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Head Finish\u003c\/td\u003e\n\u003ctd\u003eNatural\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCylinder Head Material\u003c\/td\u003e\n\u003ctd\u003eAluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003eRaised\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Port Shape\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntake Port Shape\u003c\/td\u003e\n\u003ctd\u003eRectangular\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntake Runner\u003c\/td\u003e\n\u003ctd\u003e345cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold Individually\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Guide Material\u003c\/td\u003e\n\u003ctd\u003eBronze\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49450853663016,"sku":"JM4200","price":785.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4200_001.jpg?v=1775158259"},{"product_id":"chevy-small-block-angle-plug-aluminum-cylinder-head","title":"Chevy Small Block Angled Plug Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198cc intake runners, 64cc combustion chambers, 2.02\" intake \/ 1.60\" exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eAngle plug design may require compatible headers or spark plug wire routing for proper clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eIntake Runner: 198 cc\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eAssembled: No\u003cbr\u003eIntake Valve Size: 2.02\"\u003cbr\u003eExhaust Valve Size: 1.60\"\u003cbr\u003eValve Stem Diameter: 11\/32\"\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eIntake Port Size: 2.10\" x 1.18\"\u003cbr\u003eExhaust Port Size: 1.4\" x 1.4\"\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eMaximum Spring Diameter: 1.625\"\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eSpark Plug Style: Angled\u003cbr\u003eWeight: 19 lbs (per head)\u003cbr\u003eQuantity: Sold Individually\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562248282408,"sku":"JM4100","price":605.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4100a_004_1.jpg?v=1732641186"},{"product_id":"chevy-small-block-straight-plug-aluminum-cylinder-head","title":"Chevy Small Block Straight Plug Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance-Focused Specifications\u003c\/strong\u003e\u003cbr\u003eKey specs such as intake runner volume, combustion chamber size, valve sizing, and straight plug layout are selected to support a strong balance of street drivability and performance output.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003c\/p\u003e\n\u003cp\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eStraight plug design is intended for standard-style SBC header and plug wire layouts; always verify header clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eIntake Runner: 198 cc\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eQuantity: Sold Individually\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562248413480,"sku":"JM4100S","price":595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4100s_001.jpg?v=1732641193"},{"product_id":"ford-small-block-aluminum-cylinder-head","title":"Ford Small Block Aluminum Cylinder Head","description":"\u003cp\u003eIf you're looking to rebuild your old Small Block Ford powerplant, you can't go wrong with a set of performance cylinder heads. TSP's heads are cast from premium aluminum for improved weight and heat management over the old iron. They are engineered and are not CNC-ported for maximum horsepower and torque. This bare assembly is a great starting point for a performance engine build. It's designed for maximum flow and performance in the hands of a skilled builder or machine shop. It features a thick deck to help resist warping and comes with threaded bolt holes on the ends for an easy install.\u003c\/p\u003e\n\u003cp\u003eCOMPATIBLE WITH\u003cbr\u003eFORD SMALL BLOCK WINDSOR V8\u003c\/p\u003e\n\u003cp\u003e• 4.7L \/ 289 in³\u003cbr\u003e• 5.0L \/ 302 in³\u003cbr\u003e• 5.8L \/ 351 in³ (351W Windsor)\u003c\/p\u003e\n\u003cp\u003eCOMMON VEHICLE APPLICATIONS\u003c\/p\u003e\n\u003cp\u003eFord Mustang (1965–1995 289 \/ 302 \/ 351W equipped)\u003cbr\u003eFord F-Series (Small Block Windsor equipped)\u003cbr\u003eFord Bronco (Small Block Windsor equipped)\u003cbr\u003eFord Falcon \/ Fairlane (Small Block Windsor equipped)\u003cbr\u003eMercury Cougar (Small Block Windsor equipped)\u003c\/p\u003e\n\u003cp\u003eNOTES\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford Small Block Windsor engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eWill not fit 351C Cleveland, 351M, 400M, FE, or 385-series Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e \u003ctr\u003e \u003ctd\u003eAssembled\u003c\/td\u003e \u003ctd\u003eNo\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCombustion Chamber Style\u003c\/td\u003e \u003ctd\u003eHeart\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCombustion Chamber Volume\u003c\/td\u003e \u003ctd\u003e60cc\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCylinder Head Finish\u003c\/td\u003e \u003ctd\u003eNatural\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eCylinder Head Material\u003c\/td\u003e \u003ctd\u003eAluminum\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eExhaust Port Location\u003c\/td\u003e \u003ctd\u003eStandard\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eExhaust Port Shape\u003c\/td\u003e \u003ctd\u003eRectangular\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eIntake Port Location\u003c\/td\u003e \u003ctd\u003eStandard\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eIntake Port Shape\u003c\/td\u003e \u003ctd\u003eRectangular\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eIntake Runner\u003c\/td\u003e \u003ctd\u003e185cc\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eQuantity\u003c\/td\u003e \u003ctd\u003eSold Individually\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003eValve Guide Material\u003c\/td\u003e \u003ctd\u003eBronze\u003c\/td\u003e \u003c\/tr\u003e \u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562248511784,"sku":"JM4300","price":624.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4300_001.jpg?v=1732641205"},{"product_id":"chevy-ls6-aluminum-cylinder-head","title":"Chevy LS1, LS6 Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your GM LS with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 210cc intake runners, 64cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - CATHEDRAL PORT\u003c\/p\u003e\n\u003cp\u003e• 4.8L \/ 293 in³ (LR4, LY2)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59, L33, LC9, LH6, LY5)\u003cbr\u003e• 5.7L \/ 346 in³ (LS1, LS6)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9, LY6 with cathedral-port setup)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChevrolet Corvette (LS1 \/ LS6 equipped)\u003cbr\u003eChevrolet Camaro \/ Pontiac Firebird (LS1 equipped)\u003cbr\u003ePontiac GTO (LS1 \/ LS2 equipped with compatible setup)\u003cbr\u003eGM Silverado \/ Sierra \/ SUV LS-based swaps\u003cbr\u003ePopular LS swap applications using cathedral-port intake manifolds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for cathedral-port LS intake manifold applications.\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt\/stud compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eNot compatible with rectangular-port LS3\/L92-style intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: D-port\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Cathedral\u003cbr\u003eIntake Runner: 210 cc\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562250805544,"sku":"JM4500","price":554.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4500_001.jpg?v=1775158296"},{"product_id":"chevy-ls3-aluminum-cylinder-head","title":"Chevy LS3 Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your GM LS with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 260cc intake runners, 68.4cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - RECTANGULAR PORT\u003c\/p\u003e\n\u003cp\u003e• 6.0L \/ 364 in³ (L76, L77, L98)\u003cbr\u003e• 6.2L \/ 376 in³ (LS3, L92, L99, L9H)\u003cbr\u003e• 7.0L \/ 427 in³ (LS7 requires application-specific verification)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChevrolet Corvette (LS3 equipped)\u003cbr\u003eChevrolet Camaro (LS3 \/ L99 equipped)\u003cbr\u003eChevrolet SS \/ Pontiac G8 (LS3 \/ L76 equipped)\u003cbr\u003eCadillac CTS-V applications using compatible LS architecture\u003cbr\u003eGM trucks and swaps using rectangular-port LS cylinder heads\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for rectangular-port LS intake manifold applications.\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt\/stud compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eNot compatible with cathedral-port LS intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 68.4 cc\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: D-port\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Cathedral\u003cbr\u003eIntake Runner: 260 cc\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49562250871080,"sku":"JM4600","price":640.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/jm4600_002.jpg?v=1732641217"},{"product_id":"chevy-small-block-cylinder-head-dowel-pins","title":"Chevy Small Block Cylinder Head Dowel Pins","description":"\u003cp\u003eRestore accurate cylinder head alignment on your Chevy Small Block engine with application-specific cylinder head dowel pins. Designed to properly locate the cylinder head on the block, these dowels help support gasket alignment, sealing consistency, and a cleaner engine assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Head Location\u003c\/strong\u003e\u003cbr\u003ePrecision dowel pins help position the cylinder head correctly on the engine block, reducing alignment issues during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupports Gasket Sealing\u003c\/strong\u003e\u003cbr\u003eProper cylinder head location helps keep the head gasket aligned with the block and combustion chambers for a more reliable seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication-Specific Fit\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed engine family to support correct installation during cylinder head service, rebuilds, or performance upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Repairs\u003c\/strong\u003e\u003cbr\u003eRecommended when replacing damaged, missing, or worn dowel pins during engine assembly or cylinder head installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eVerify fastener style, head design, and block\/head combination before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818406912296,"sku":"JM4149","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4149_01NEW.jpg?v=1768841493"},{"product_id":"chevy-big-block-cylinder-head-dowel-pins","title":"Chevy Big Block Cylinder Head Dowel Pins","description":"\u003cp\u003eRestore accurate cylinder head alignment on your Chevy Big Block engine with application-specific cylinder head dowel pins. Designed to properly locate the cylinder head on the block, these dowels help support gasket alignment, sealing consistency, and a cleaner engine assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Head Location\u003c\/strong\u003e\u003cbr\u003ePrecision dowel pins help position the cylinder head correctly on the engine block, reducing alignment issues during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupports Gasket Sealing\u003c\/strong\u003e\u003cbr\u003eProper cylinder head location helps keep the head gasket aligned with the block and combustion chambers for a more reliable seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication-Specific Fit\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed engine family to support correct installation during cylinder head service, rebuilds, or performance upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Repairs\u003c\/strong\u003e\u003cbr\u003eRecommended when replacing damaged, missing, or worn dowel pins during engine assembly or cylinder head installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003cbr\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Big Block Chevy engine platforms.\u003c\/p\u003e\n\u003cp\u003eVerify cylinder head generation, port style, fastener length, washer requirements, and torque specifications before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818406977832,"sku":"JM4249","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4249_01NEW.jpg?v=1768841733"},{"product_id":"ford-flathead-aluminum-cylinder-head","title":"Ford Flathead Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Ford Flathead with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring performance-focused port, chamber, and valve specifications, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD FLATHEAD V8 ENGINES\u003cbr\u003e• 3.6L \/ 221 in³\u003cbr\u003e• 3.9L \/ 239 in³\u003cbr\u003e• 4.2L \/ 255 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord passenger cars (1939–1948 Flathead V8 equipped)\u003cbr\u003eFord trucks using compatible Flathead V8 engines\u003cbr\u003eHot rod and vintage Ford Flathead builds\u003cbr\u003eOffenhauser-style Flathead cylinder head applications (where listed)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eVerify year range, head style, gasket selection, and cooling passage compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford Small Block Windsor, FE, Coyote, or Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: No\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eQuantity: Sold Individually\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407043368,"sku":"JM4325","price":488.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4325_02.jpg?v=1760655562"},{"product_id":"ford-small-block-cylinder-head-dowel-pins","title":"Ford Small Block Cylinder Head Dowel Pins","description":"\u003cp\u003eRestore accurate cylinder head alignment on your Ford Small Block Windsor engine with application-specific cylinder head dowel pins. Designed to properly locate the cylinder head on the block, these dowels help support gasket alignment, sealing consistency, and a cleaner engine assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Head Location\u003c\/strong\u003e\u003cbr\u003ePrecision dowel pins help position the cylinder head correctly on the engine block, reducing alignment issues during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupports Gasket Sealing\u003c\/strong\u003e\u003cbr\u003eProper cylinder head location helps keep the head gasket aligned with the block and combustion chambers for a more reliable seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication-Specific Fit\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed engine family to support correct installation during cylinder head service, rebuilds, or performance upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Repairs\u003c\/strong\u003e\u003cbr\u003eRecommended when replacing damaged, missing, or worn dowel pins during engine assembly or cylinder head installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD SMALL BLOCK WINDSOR V8\u003cbr\u003e• 4.7L \/ 289 in³\u003cbr\u003e• 5.0L \/ 302 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Mustang (1965–1995 289 \/ 302 \/ 351W equipped)\u003cbr\u003eFord F-Series (Small Block Windsor equipped)\u003cbr\u003eFord Bronco (Small Block Windsor equipped)\u003cbr\u003eFord Falcon \/ Fairlane (Small Block Windsor equipped)\u003cbr\u003eMercury Cougar (Small Block Windsor equipped)\u003c\/p\u003e\n\u003cp\u003eNOTES\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford Small Block Windsor engine platforms.\u003c\/p\u003e\n\u003cp\u003eVerify head bolt or stud length, cylinder head design, and washer requirements before installation.\u003c\/p\u003e\n\u003cp\u003eWill not fit 351C Cleveland, 351M, 400M, FE, or 385-series Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407076136,"sku":"JM4349","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4349_01NEW.jpg?v=1768841896"},{"product_id":"ford-big-block-cylinder-head-dowel-pins","title":"Ford Big Block Cylinder Head Dowel Pins","description":"\u003cp\u003eRestore accurate cylinder head alignment on your Ford Big Block engine with application-specific cylinder head dowel pins. Designed to properly locate the cylinder head on the block, these dowels help support gasket alignment, sealing consistency, and a cleaner engine assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Head Location\u003c\/strong\u003e\u003cbr\u003ePrecision dowel pins help position the cylinder head correctly on the engine block, reducing alignment issues during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupports Gasket Sealing\u003c\/strong\u003e\u003cbr\u003eProper cylinder head location helps keep the head gasket aligned with the block and combustion chambers for a more reliable seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication-Specific Fit\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed engine family to support correct installation during cylinder head service, rebuilds, or performance upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Repairs\u003c\/strong\u003e\u003cbr\u003eRecommended when replacing damaged, missing, or worn dowel pins during engine assembly or cylinder head installation.\u003c\/p\u003e\n\u003cp\u003eCOMPATIBLE WITH\u003cbr\u003eFORD BIG BLOCK \"385\" V8\u003cbr\u003e• 7.0 L \/ 429 in3\u003cbr\u003e• 7.5 L \/ 460 in3\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407108904,"sku":"JM4449","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4449_01NEW.jpg?v=1768842134"},{"product_id":"chevy-ls1-ls6-cnc-ported-aluminum-cylinder-head","title":"Chevy LS1, LS6 CNC Ported Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your GM LS with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 210cc intake runners, 64cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCNC-Ported Airflow\u003c\/strong\u003e\u003cbr\u003eCNC-ported intake and exhaust runners improve airflow consistency from port to port, supporting stronger horsepower potential and more predictable performance in upgraded engine combinations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBare Head Build Flexibility\u003c\/strong\u003e\u003cbr\u003eBare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - CATHEDRAL PORT\u003c\/p\u003e\n\u003cp\u003e• 4.8L \/ 293 in³ (LR4, LY2)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59, L33, LC9, LH6, LY5)\u003cbr\u003e• 5.7L \/ 346 in³ (LS1, LS6)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9, LY6 with cathedral-port setup)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChevrolet Corvette (LS1 \/ LS6 equipped)\u003cbr\u003eChevrolet Camaro \/ Pontiac Firebird (LS1 equipped)\u003cbr\u003ePontiac GTO (LS1 \/ LS2 equipped with compatible setup)\u003cbr\u003eGM Silverado \/ Sierra \/ SUV LS-based swaps\u003cbr\u003ePopular LS swap applications using cathedral-port intake manifolds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for cathedral-port LS intake manifold applications.\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt\/stud compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eNot compatible with rectangular-port LS3\/L92-style intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eCylinder Head Finish: Natural\u003cbr\u003eCylinder Head Material: Aluminum\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: D-port\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Cathedral\u003cbr\u003eIntake Runner: 210 cc\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407174440,"sku":"JM4530","price":1480.25,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4530_001_b2ac18ae-3872-489e-bb32-e9fc1a0affe4.jpg?v=1739807249"},{"product_id":"chevy-ls-cylinder-head-dowel-pins","title":"Chevy LS Cylinder Head Dowel Pins","description":"\u003cp\u003eRestore accurate cylinder head alignment on your GM LS Gen III\/IV engine with application-specific cylinder head dowel pins. Designed to properly locate the cylinder head on the block, these dowels help support gasket alignment, sealing consistency, and a cleaner engine assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Head Location\u003c\/strong\u003e\u003cbr\u003ePrecision dowel pins help position the cylinder head correctly on the engine block, reducing alignment issues during assembly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSupports Gasket Sealing\u003c\/strong\u003e\u003cbr\u003eProper cylinder head location helps keep the head gasket aligned with the block and combustion chambers for a more reliable seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication-Specific Fit\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed engine family to support correct installation during cylinder head service, rebuilds, or performance upgrades.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for Rebuilds \u0026amp; Repairs\u003c\/strong\u003e\u003cbr\u003eRecommended when replacing damaged, missing, or worn dowel pins during engine assembly or cylinder head installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES\u003cbr\u003e• 4.8L \/ 293 in³ (LR4, LY2)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59, L33, LC9, LH6, LY5)\u003cbr\u003e• 5.7L \/ 346 in³ (LS1, LS6)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9, LY6, L76, L96)\u003cbr\u003e• 6.2L \/ 376 in³ (LS3, L92, L99)\u003cbr\u003e• 7.0L \/ 427 in³ (LS7, application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Corvette \/ Camaro LS-equipped models\u003cbr\u003eGM Silverado \/ Sierra \/ Tahoe \/ Suburban LS-based applications\u003cbr\u003ePontiac Firebird \/ GTO \/ G8 LS-equipped models\u003cbr\u003ePopular LS swap applications\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for LS-based engines only.\u003c\/p\u003e\n\u003cp\u003eVerify cathedral-port vs rectangular-port compatibility when selecting cylinder heads or intake manifolds.\u003c\/p\u003e\n\u003cp\u003eVerify correct head bolt\/stud style for your block, cylinder head casting, and model year.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407207208,"sku":"JM4549","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4549_01NEW.jpg?v=1768842555"},{"product_id":"pro-series-ford-13-17-5-0l-coyote-m11-cylinder-head-stud-kit","title":"Pro Series Ford 13-17 5.0L Coyote M11 Cylinder Head Stud Kit","description":"\u003cp\u003eUpgrade your Ford 5.0L Coyote build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTorque-Specific Installation\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed application torque procedure: 3 steps, to 110 ft-lbs. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD 5.0L COYOTE V8\u003cbr\u003e• 5.0L \/ 302 in³ Coyote (Gen 1 \/ Gen 2, 2013–2017 applications)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Mustang GT (2013–2017 5.0L Coyote equipped)\u003cbr\u003eFord F-150 (2013–2017 5.0L Coyote equipped, where applicable)\u003cbr\u003eCoyote swap and performance builds using compatible cylinder heads\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for 2013–2017 Ford 5.0L Coyote M11\/M12 cylinder head stud applications as listed by SKU.\u003c\/p\u003e\n\u003cp\u003eVerify model year, thread size, cylinder head design, and torque procedure before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford Small Block Windsor, Modular 4.6L\/5.4L, FE, or Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eTorque: 3 steps, to 110 ft-lbs\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Stud\u003cbr\u003eGrade: Performance\u003cbr\u003eHead Style: 12-point\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818407960872,"sku":"635-819751","price":103.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/635-819751_02.jpg?v=1743807092"},{"product_id":"pro-series-ford-11-12-5-0l-coyote-m12-cylinder-head-stud-kit","title":"Pro Series Ford 11-12 5.0L Coyote M12 Cylinder Head Stud Kit","description":"\u003cp\u003eUpgrade your Ford 5.0L Coyote build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTorque-Specific Installation\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed application torque procedure: 3 steps, to 125 ft-lbs. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD 5.0L COYOTE V8\u003cbr\u003e• 5.0L \/ 302 in³ Coyote (Gen 1, 2011–2012 applications)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Mustang GT (2011–2012 5.0L Coyote equipped)\u003cbr\u003eFord F-150 (2011–2012 5.0L Coyote equipped, where applicable)\u003cbr\u003eCoyote swap and performance builds using compatible cylinder heads\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for 2011–2012 Ford 5.0L Coyote M11\/M12 cylinder head stud applications as listed by SKU.\u003c\/p\u003e\n\u003cp\u003eVerify model year, thread size, cylinder head design, and torque procedure before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford Small Block Windsor, Modular 4.6L\/5.4L, FE, or Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eTorque: 3 steps, to 125 ft-lbs\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Stud\u003cbr\u003eGrade: Performance\u003cbr\u003eHead Style: 12-point\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":49818408812840,"sku":"635-819753","price":120.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/635-819753_01.jpg?v=1739480460"},{"product_id":"pro-series-nissan-2-6l-gtr-rb26dett-cylinder-head-stud-kit","title":"Pro Series Nissan 2.6L GTR RB26DETT Cylinder Head Stud Kit","description":"\u003cp\u003eUpgrade your Nissan RB inline-six build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTorque-Specific Installation\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed application torque procedure: 3 Steps up to 90ft-lbs with Lube. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eNISSAN RB SERIES INLINE-6\u003cbr\u003e• 2.6L RB26DETT\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eNissan Skyline GT-R (RB26DETT equipped)\u003cbr\u003eRB26DETT swap and performance builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Nissan RB26DETT cylinder head stud applications.\u003c\/p\u003e\n\u003cp\u003eVerify block, cylinder head, gasket thickness, and torque procedure before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with RB20\/RB25 applications unless specifically confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eTorque: 3 Steps up to 90 ft-lbs with Lube\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Cylinder Head Stud\u003cbr\u003eGrade: Performance\u003cbr\u003eNut Style: 12-point nuts\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":50550821224744,"sku":"149-81958","price":94.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/149-81958_02.jpg?v=1761922328"},{"product_id":"pro-series-ford-7-3l-godzilla-cylinder-head-stud-kit","title":"Pro Series Ford 7.3L Godzilla Cylinder Head Stud Kit","description":"\u003cp\u003eUpgrade your Ford 7.3L Godzilla build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTorque-Specific Installation\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed application torque procedure: 3 steps to 75ft-lbs - then 90°, then 90°. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD 7.3L GODZILLA GAS V8\u003cbr\u003e• 7.3L \/ 445 in³ Godzilla V8\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Super Duty trucks with 7.3L gas V8\u003cbr\u003eGodzilla swap and performance builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford 7.3L Godzilla cylinder head stud applications.\u003c\/p\u003e\n\u003cp\u003eVerify model year, cylinder head design, gasket selection, and torque procedure before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford 7.3L Power Stroke diesel, Coyote, FE, or Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eTorque: 3 steps to 75 ft-lbs - then 90°, then 90°\u003cbr\u003eColor: Black\u003cbr\u003eFastener Type: Cylinder Head Stud\u003cbr\u003eGrade: Performance\u003cbr\u003eNut Style: 12-point nuts\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":50550821716264,"sku":"673-81952","price":176.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/673-81952_02.jpg?v=1761751067"},{"product_id":"pro-series-ford-big-block-429-460-edelbrock-rpm-cylinder-head-bolt-kit","title":"Pro Series Ford Big Block 429-460 Edelbrock RPM Cylinder Head Bolt Kit","description":"\u003cp\u003eUpgrade your Ford Big Block build with a Pro Series cylinder head bolt kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eReliable Head Bolt Clamping\u003c\/strong\u003e\u003cbr\u003eApplication-specific head bolts provide strong, even clamping force to help maintain head gasket seal and cylinder pressure in performance engine builds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTorque-Specific Installation\u003c\/strong\u003e\u003cbr\u003eDesigned for the listed application torque procedure: 4 Steps up to 140ft-lbs with Lube. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD 385-SERIES BIG BLOCK V8\u003cbr\u003e• 7.0L \/ 429 in³\u003cbr\u003e• 7.5L \/ 460 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Torino \/ Thunderbird \/ Galaxie (429 \/ 460 equipped)\u003cbr\u003eFord F-Series (429 \/ 460 equipped)\u003cbr\u003eLincoln and Mercury 429 \/ 460 applications\u003cbr\u003eBig Block Ford performance and swap builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford 429\/460 Edelbrock RPM-style cylinder head applications.\u003c\/p\u003e\n\u003cp\u003eVerify cylinder head brand, fastener length, washer requirements, and torque procedure before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Ford FE, Small Block Windsor, Cleveland, or Coyote engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eTorque: 4 Steps up to 140 ft-lbs with Lube\u003cbr\u003eColor: Black\u003cbr\u003eFastener Style: Cylinder Head Bolt\u003cbr\u003eGrade: Performance\u003cbr\u003eHead Style: 12-point\u003cbr\u003eMaterial: 35 Chromoly Steel\u003cbr\u003eQuantity: Sold as a kit\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":50551053943080,"sku":"622-82068","price":137.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/622-82068_02.jpg?v=1764190718"},{"product_id":"pro-series-chevy-big-block-cylinder-head-hex-stud-kit","title":"Pro Series Chevy Big Block Cylinder Head Hex Stud Kit","description":"\u003cp\u003eUpgrade your Chevy Big Block build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Installation\u003c\/strong\u003e\u003cbr\u003eHex fastener design and matched hardware support more consistent torque readings during installation. Follow the included or manufacturer-recommended torque sequence and lubricant requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a Kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003cbr\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Big Block Chevy engine platforms.\u003c\/p\u003e\n\u003cp\u003eVerify cylinder head generation, port style, fastener length, washer requirements, and torque specifications before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Color\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Material\u003c\/td\u003e\n\u003ctd\u003e35 Chromoly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Style\u003c\/td\u003e\n\u003ctd\u003eStud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Style\u003c\/td\u003e\n\u003ctd\u003eHex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":50809938379048,"sku":"722-81949","price":133.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/722-81949_01.jpg?v=1767630739"},{"product_id":"pro-series-lsx-cylinder-head-12-point-stud-kit","title":"Pro Series LSX Cylinder Head 12-point Stud Kit","description":"\u003cp\u003eUpgrade your GM LS Gen III\/IV build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Head Alignment \u0026amp; Clamping\u003c\/strong\u003e\u003cbr\u003eStud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePerformance Fastener Construction\u003c\/strong\u003e\u003cbr\u003eConstructed from 35 Chromoly with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAccurate Installation\u003c\/strong\u003e\u003cbr\u003e12-Point fastener design and matched hardware support more consistent torque readings during installation. Follow the included or manufacturer-recommended torque sequence and lubricant requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete Application-Specific Kit\u003c\/strong\u003e\u003cbr\u003eSold as a Kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LSX \/ AFTERMARKET LS-BASED V8 ENGINE PLATFORMS\u003cbr\u003e• LSX and aftermarket LS-based blocks\u003cbr\u003e• Common LS-based stroker and performance builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro \/ Corvette LSX performance builds\u003cbr\u003eGM truck and SUV LSX swap applications\u003cbr\u003eDrag, street\/strip, and high-horsepower LS-based builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for LSX \/ aftermarket LS-based cylinder head stud applications.\u003c\/p\u003e\n\u003cp\u003eVerify block thread depth, cylinder head casting, gasket thickness, and manufacturer torque requirements before installation.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines unless specifically confirmed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Color\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Material\u003c\/td\u003e\n\u003ctd\u003e35 Chromoly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFastener Style\u003c\/td\u003e\n\u003ctd\u003eStud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Style\u003c\/td\u003e\n\u003ctd\u003e12-Point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSold as a Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":50809944572200,"sku":"734-81960","price":130.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/734-81960_01.jpg?v=1767134048"},{"product_id":"chevy-small-block-angled-plug-flat-tappet-assembled-aluminum-cylinder-head","title":"Chevy Small Block Angled Plug Flat Tappet Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, 2.020 in. intake \/ 1.600 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for flat tappet camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eAngle plug design may require compatible headers or spark plug wire routing for proper clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.400 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.400 in.\u003cbr\u003eExhaust Valve Diameter: 1.600 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eGuide Plate Material: Chromoly Steel\u003cbr\u003eIntake Port Height: 2.100 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.180 in.\u003cbr\u003eIntake Runner Volume: 198 cc\u003cbr\u003eIntake Valve Diameter: 2.020 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003ePush Rod Diameter: 0.3125 in.\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eSpark Plug Style: Angled\u003cbr\u003eValve Angle: 23.0 deg.\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Spring Retainer Material: Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003cbr\u003eWeight: 19 lbs.\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591784956200,"sku":"JM4120","price":500.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4120A-01.jpg?v=1777405088"},{"product_id":"chevy-small-block-straight-plug-flat-tappet-assembled-aluminum-cylinder-head","title":"Chevy Small Block Straight Plug Flat Tappet Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, 2.020 in. intake \/ 1.600 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for flat tappet camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eStraight plug design is intended for standard-style SBC header and plug wire layouts; always verify header clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp data-start=\"62\" data-end=\"81\"\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.400 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.400 in.\u003cbr\u003eExhaust Valve Diameter: 1.600 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eGuide Plate Material: Chromoly Steel\u003cbr\u003eIntake Port Height: 2.100 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.180 in.\u003cbr\u003eIntake Runner Volume: 198 cc\u003cbr\u003eIntake Valve Diameter: 2.020 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003ePush Rod Diameter: 0.3125 in.\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eSpark Plug Style: Straight\u003cbr\u003eValve Angle: 23.0 deg.\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Spring Retainer Material: Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003cbr\u003eWeight: 19 lbs.\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591793901864,"sku":"JM4120S","price":605.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4120S-01.jpg?v=1777405922"},{"product_id":"chevy-small-block-angled-plug-hydraulic-roller-assembled-aluminum-cylinder-head","title":"Chevy Small Block Angled Plug Hydraulic Roller Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, 2.020 in. intake \/ 1.600 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for hydraulic roller camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eAngle plug design may require compatible headers or spark plug wire routing for proper clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.400 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.400 in.\u003cbr\u003eExhaust Valve Diameter: 1.600 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eGuide Plate Material: Chromoly Steel\u003cbr\u003eIntake Port Height: 2.100 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.180 in.\u003cbr\u003eIntake Runner Volume: 198 cc\u003cbr\u003eIntake Valve Diameter: 2.020 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eSpark Plug Style: Angled\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003cbr\u003eWeight: 19 lbs.\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591795933480,"sku":"JM4121","price":605.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4121A-01.jpg?v=1777405737"},{"product_id":"chevy-small-block-straight-plug-hydraulic-roller-assembled-aluminum-cylinder-head","title":"Chevy Small Block Straight Plug Hydraulic Roller Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Small Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, 2.020 in. intake \/ 1.600 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for hydraulic roller camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET SMALL BLOCK V8 GEN. I\u003cbr\u003e• 4.3L \/ 262 in³\u003cbr\u003e• 4.3L \/ 265 in³\u003cbr\u003e• 4.4L \/ 267 in³\u003cbr\u003e• 4.6L \/ 283 in³\u003cbr\u003e• 4.9L \/ 302 in³\u003cbr\u003e• 5.0L \/ 305 in³\u003cbr\u003e• 5.0L \/ 307 in³\u003cbr\u003e• 5.4L \/ 327 in³\u003cbr\u003e• 5.7L \/ 350 in³\u003cbr\u003e• 6.6L \/ 400 in³\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Camaro (1967–1995 SBC equipped)\u003cbr\u003eChevrolet Chevelle (1964–1977 SBC)\u003cbr\u003eChevrolet Nova (1962–1979 SBC)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (1960–1995 SBC)\u003cbr\u003eChevrolet Impala \/ Caprice (SBC equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits Gen I Small Block Chevy engines (1955–1995).\u003c\/p\u003e\n\u003cp\u003eFits perimeter-bolt valve covers and pre-Vortec intake manifolds.\u003c\/p\u003e\n\u003cp\u003eCompatible with common SBC stroker builds (383 \/ 406).\u003c\/p\u003e\n\u003cp\u003eStraight plug design is intended for standard-style SBC header and plug wire layouts; always verify header clearance.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with LT1 \/ LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.400 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.400 in.\u003cbr\u003eExhaust Valve Diameter: 1.600 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eGuide Plate Material: Chromoly Steel\u003cbr\u003eIntake Port Height: 2.100 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.180 in.\u003cbr\u003eIntake Runner Volume: 198 cc\u003cbr\u003eIntake Valve Diameter: 2.020 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eSpark Plug Style: Straight\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003cbr\u003eWeight: 19 lbs.\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591800062248,"sku":"JM4121S","price":605.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4121S-01.jpg?v=1777406173"},{"product_id":"chevy-big-block-flat-tappet-assembled-aluminum-cylinder-head","title":"Chevy Big Block Flat Tappet Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Big Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 345 cc intake runners, 124 cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for flat tappet camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003c\/p\u003e\n\u003cp\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Big Block Chevy engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, exhaust header, valve lift, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 124 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.700 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.500 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eIntake Port Height: 2.300 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.400 in.\u003cbr\u003eIntake Runner Volume: 345 cc\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Springs Included: Yes\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591801635112,"sku":"JM4220","price":785.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4220-01.jpg?v=1777405282"},{"product_id":"chevy-big-block-hydraulic-roller-assembled-aluminum-cylinder-head","title":"Chevy Big Block Hydraulic Roller Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Big Block Chevy with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 345 cc intake runners, 124 cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for hydraulic roller camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eCHEVROLET BIG BLOCK V8\u003c\/p\u003e\n\u003cp\u003e• 6.5L \/ 396 in³\u003cbr\u003e• 6.6L \/ 402 in³\u003cbr\u003e• 7.0L \/ 427 in³\u003cbr\u003e• 7.4L \/ 454 in³\u003cbr\u003e• 8.1L \/ 496 in³ stroker combinations (application-specific verification required)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChevrolet Chevelle \/ El Camino (Big Block equipped)\u003cbr\u003eChevrolet Camaro (Big Block equipped or swapped)\u003cbr\u003eChevrolet C10 \/ C\/K Trucks (Big Block equipped)\u003cbr\u003eChevrolet Impala \/ Caprice (Big Block equipped)\u003cbr\u003eMarine, street\/strip, and performance Big Block Chevy builds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Big Block Chevy engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, exhaust header, valve lift, and piston-to-valve clearance.\u003c\/p\u003e\n\u003cp\u003eNot compatible with Small Block Chevy, LS, or LT engine platforms.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 124 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Height: 1.700 in.\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Square\u003cbr\u003eExhaust Port Width: 1.500 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eIntake Port Height: 2.300 in.\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Port Width: 1.400 in.\u003cbr\u003eIntake Runner Volume: 345 cc\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Springs Included: Yes\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591815758120,"sku":"JM4221","price":785.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4221-01.jpg?v=1777404898"},{"product_id":"ford-small-block-flat-tappet-assembled-aluminum-cylinder-head","title":"Ford Small Block Flat Tappet Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Ford Small Block Windsor with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 185 cc intake runners, 60 cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for flat tappet camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD SMALL BLOCK WINDSOR V8\u003cbr\u003e• 4.7L \/ 289 in³\u003cbr\u003e• 5.0L \/ 302 in³\u003cbr\u003e• 5.8L \/ 351 in³ (351W Windsor)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Mustang (1965–1995 289 \/ 302 \/ 351W equipped)\u003cbr\u003eFord F-Series (Small Block Windsor equipped)\u003cbr\u003eFord Bronco (Small Block Windsor equipped)\u003cbr\u003eFord Falcon \/ Fairlane (Small Block Windsor equipped)\u003cbr\u003eMercury Cougar (Small Block Windsor equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford Small Block Windsor engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eWill not fit 351C Cleveland, 351M, 400M, FE, or 385-series Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 60 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Rectangle\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Runner Volume: 185 cc\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Spring Retainer Material: Chromoly Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591826407720,"sku":"JM4320","price":640.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4320-01.jpg?v=1777406446"},{"product_id":"ford-small-block-hydraulic-roller-assembled-aluminum-cylinder-head","title":"Ford Small Block Hydraulic Roller Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your Ford Small Block Windsor with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 185 cc intake runners, 60 cc combustion chambers, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for hydraulic roller camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eFORD SMALL BLOCK WINDSOR V8\u003cbr\u003e• 4.7L \/ 289 in³\u003cbr\u003e• 5.0L \/ 302 in³\u003cbr\u003e• 5.8L \/ 351 in³ (351W Windsor)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eFord Mustang (1965–1995 289 \/ 302 \/ 351W equipped)\u003cbr\u003eFord F-Series (Small Block Windsor equipped)\u003cbr\u003eFord Bronco (Small Block Windsor equipped)\u003cbr\u003eFord Falcon \/ Fairlane (Small Block Windsor equipped)\u003cbr\u003eMercury Cougar (Small Block Windsor equipped)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for Ford Small Block Windsor engine platforms.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eWill not fit 351C Cleveland, 351M, 400M, FE, or 385-series Big Block Ford engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 60 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: Rectangle\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Rectangle\u003cbr\u003eIntake Runner Volume: 185 cc\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591845740840,"sku":"JM4321","price":640.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4321-01.jpg?v=1777406656"},{"product_id":"chevy-ls1-ls6-assembled-aluminum-cylinder-head","title":"Chevy LS1, LS6 Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your GM LS with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 210 cc intake runners, 64 cc combustion chambers, 2.000 in. intake \/ 1.550 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for performance camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - CATHEDRAL PORT\u003cbr\u003e• 4.8L \/ 293 in³ (LR4, LY2)\u003cbr\u003e• 5.3L \/ 325 in³ (LM7, L59, L33, LC9, LH6, LY5)\u003cbr\u003e• 5.7L \/ 346 in³ (LS1, LS6)\u003cbr\u003e• 6.0L \/ 364 in³ (LQ4, LQ9, LY6 with cathedral-port setup)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Corvette (LS1 \/ LS6 equipped)\u003cbr\u003eChevrolet Camaro \/ Pontiac Firebird (LS1 equipped)\u003cbr\u003ePontiac GTO (LS1 \/ LS2 equipped with compatible setup)\u003cbr\u003eGM Silverado \/ Sierra \/ SUV LS-based swaps\u003cbr\u003ePopular LS swap applications using cathedral-port intake manifolds\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for cathedral-port LS intake manifold applications.\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt\/stud compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eNot compatible with rectangular-port LS3\/L92-style intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: D-port\u003cbr\u003eExhaust Valve Diameter: 1.550 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Cathedral\u003cbr\u003eIntake Runner Volume: 210 cc\u003cbr\u003eIntake Valve Diameter: 2.000 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Spring Maximum Lift: 0.660 in.\u003cbr\u003eValve Spring Retainer Material: Chromoly Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591853211944,"sku":"JM4520","price":660.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4520-01.jpg?v=1777405433"},{"product_id":"chevy-ls3-assembled-aluminum-cylinder-head","title":"Chevy LS3 Assembled Aluminum Cylinder Head","description":"\u003cp\u003eUpgrade your GM LS with assembled aluminum cylinder heads engineered to provide reliable airflow and combustion efficiency for street and performance builds. Featuring 260cc intake runners, 64 cc combustion chambers, 2.165 in. intake \/ 1.590 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImproved Airflow \u0026amp; Power Potential\u003c\/strong\u003e\u003cbr\u003eOptimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAssembled Valve Train Setup\u003c\/strong\u003e\u003cbr\u003eDelivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for performance camshaft applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAluminum Construction\u003c\/strong\u003e\u003cbr\u003eLightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt for Street \u0026amp; Performance Builds\u003c\/strong\u003e\u003cbr\u003eIdeal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMPATIBLE WITH\u003c\/strong\u003e\u003cbr\u003eGM LS SERIES V8 ENGINES - RECTANGULAR PORT\u003cbr\u003e• 6.0L \/ 364 in³ (L76, L77, L98)\u003cbr\u003e• 6.2L \/ 376 in³ (LS3, L92, L99, L9H)\u003cbr\u003e• 7.0L \/ 427 in³ (LS7 requires application-specific verification)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCOMMON VEHICLE APPLICATIONS\u003c\/strong\u003e\u003cbr\u003eChevrolet Corvette (LS3 equipped)\u003cbr\u003eChevrolet Camaro (LS3 \/ L99 equipped)\u003cbr\u003eChevrolet SS \/ Pontiac G8 (LS3 \/ L76 equipped)\u003cbr\u003eCadillac CTS-V applications using compatible LS architecture\u003cbr\u003eGM trucks and swaps using rectangular-port LS cylinder heads\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNOTES\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDesigned for rectangular-port LS intake manifold applications.\u003c\/p\u003e\n\u003cp\u003eVerify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt\/stud compatibility before installation.\u003c\/p\u003e\n\u003cp\u003eCylinder head sold individually (purchase quantity of 2 required for complete engine).\u003c\/p\u003e\n\u003cp\u003eNot compatible with cathedral-port LS intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003cbr\u003eAssembled: Yes\u003cbr\u003eCNC Ported: No\u003cbr\u003eCombustion Chamber Style: Heart\u003cbr\u003eCombustion Chamber Volume: 64 cc\u003cbr\u003eDeck Height: Standard\u003cbr\u003eDeck Thickness: Standard\u003cbr\u003eExhaust Crossover: No\u003cbr\u003eExhaust Port Location: Standard\u003cbr\u003eExhaust Port Shape: D-port\u003cbr\u003eExhaust Valve Diameter: 1.590 in.\u003cbr\u003eExhaust Valve Material: Stainless Steel\u003cbr\u003eFinish: Natural\u003cbr\u003eGrade Type: Performance\u003cbr\u003eGuide Plate Material: Bronze\u003cbr\u003eIntake Port Location: Standard\u003cbr\u003eIntake Port Shape: Cathedral\u003cbr\u003eIntake Runner Volume: 260 cc\u003cbr\u003eIntake Valve Diameter: 2.165 in.\u003cbr\u003eIntake Valve Material: Stainless Steel\u003cbr\u003eMaterial: Aluminum\u003cbr\u003eQuantity: Sold Individually\u003cbr\u003eValve Guide Material: Bronze\u003cbr\u003eValve Seat Material: Steel\u003cbr\u003eValve Spring Maximum Lift: 0.660 in.\u003cbr\u003eValve Spring Retainer Material: Chromoly Steel\u003cbr\u003eValve Springs Included: No\u003cbr\u003eValves Included: Yes\u003c\/p\u003e","brand":"Top Street Performance","offers":[{"title":"Default Title","offer_id":51591862583592,"sku":"JM4620","price":695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/8356\/5608\/files\/JM4620-01.jpg?v=1777404685"}],"url":"https:\/\/topstreetperformance.com\/collections\/cylinder-heads.oembed?page=2","provider":"Top Street Performance","version":"1.0","type":"link"}