{"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","url":"https:\/\/topstreetperformance.com\/products\/chevy-small-block-straight-plug-hydraulic-roller-assembled-aluminum-cylinder-head","provider":"Top Street Performance","version":"1.0","type":"link"}