{"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\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: 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","url":"https:\/\/www.topstreetperformance.com\/products\/chevy-ls3-aluminum-cylinder-head","provider":"Top Street Performance","version":"1.0","type":"link"}