The Chevy LS3 Cylinder Head Assembly<\/strong> is the ultimate combination of factory-engineered reliability<\/strong> and performance airflow<\/strong>, making it a go-to choice for high-performance LS builds<\/strong>. Whether you’re replacing worn components, upgrading a street machine, or assembling a race-ready LS engine, these LS3 heads deliver impressive horsepower and torque gains<\/strong> while maintaining OEM fit and finish.<\/p>\n Featuring rectangular intake ports<\/strong>, high-flow valves<\/strong>, and precision machining<\/strong>, the LS3 head assembly is ideal for both naturally aspirated and boosted applications<\/strong>.<\/p>\n Product Type:<\/strong> Complete Cylinder Head Assembly<\/p>\n<\/li>\n Model:<\/strong> LS3 (Chevy LS Series)<\/p>\n<\/li>\n Material:<\/strong> High-quality aluminum casting<\/p>\n<\/li>\n Valves:<\/strong> 2.165″ intake \/ 1.590″ exhaust (LS3 spec)<\/p>\n<\/li>\n Combustion Chamber Volume:<\/strong> 68\u201370cc (nominal)<\/p>\n<\/li>\n Port Style:<\/strong> Rectangular intake ports (high-flow design)<\/p>\n<\/li>\n Condition:<\/strong> Brand New OEM-style<\/p>\n<\/li>\n Finish:<\/strong> Machined \/ Bare Aluminum<\/p>\n<\/li>\n Shipping:<\/strong> Fast Nationwide Delivery \ud83c\uddfa\ud83c\uddf8<\/p>\n<\/li>\n<\/ul>\n \u2705 OEM GM Design<\/strong> \u2013 Built to factory LS3 performance specifications for durability and flow<\/p>\n<\/li>\n \u2705 High-Flow Rectangular Ports<\/strong> \u2013 Superior intake flow for increased power output<\/p>\n<\/li>\n \u2705 Performance Ready<\/strong> \u2013 Excellent for street performance, LS swaps, or boosted setups<\/p>\n<\/li>\n \u2705 Direct Replacement<\/strong> \u2013 Bolt-on fit for LS3 and compatible LS platforms<\/p>\n<\/li>\n \u2705 Compatible with Stock & Aftermarket Components<\/strong> \u2013 Works with OEM or upgraded camshafts, intakes, and valvetrain parts<\/p>\n<\/li>\n<\/ul>\n Fits the following LS-based engines:<\/p>\n LS3<\/strong>, L99<\/strong>, L76<\/strong>, L92<\/strong>, L9H<\/strong>, and other rectangular-port LS variants<\/p>\n<\/li>\n<\/ul>\n<\/li>\n Applications:<\/p>\n Performance street cars & trucks<\/p>\n<\/li>\n LS swaps in classics, hot rods, and custom builds<\/p>\n<\/li>\n High-RPM naturally aspirated builds or forced induction applications<\/p>\n<\/li>\n<\/ul>\n<\/li>\n Works with OEM or aftermarket intakes, headers, and camshafts (pushrod length check recommended)<\/p>\n<\/li>\n<\/ul>\n 1-Year Limited Warranty<\/strong> covering manufacturer defects in materials and workmanship<\/p>\n<\/li>\n Professional installation required for warranty eligibility<\/p>\n<\/li>\n Excludes damage from racing abuse or improper installation<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":" <\/p>\n Product Type:<\/strong> Complete Cylinder Head Assembly<\/p>\n<\/li>\n Model:<\/strong> LS3 (Chevy LS Series)<\/p>\n<\/li>\n Material:<\/strong> High-quality aluminum casting<\/p>\n<\/li>\n Valves:<\/strong> 2.165″ intake \/ 1.590″ exhaust (LS3 spec)<\/p>\n<\/li>\n<\/ul>\n","protected":false},"featured_media":227143,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[183],"product_tag":[],"class_list":{"0":"post-227140","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-engine-components-accessories","8":"first","9":"instock","10":"shipping-taxable","11":"purchasable","12":"product-type-simple"},"yoast_head":"\nProduct Details:<\/strong><\/h2>\n
\n
\nKey Features:<\/strong><\/h2>\n
\n
\nCompatibility:<\/strong><\/h2>\n
\n
\n
\n
\n\ud83d\udee1\ufe0f Warranty Information:<\/strong><\/h2>\n
\n
\n