{"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\/products\/chevy-ls3-assembled-aluminum-cylinder-head","provider":"Top Street Performance","version":"1.0","type":"link"}