LS3 Cylinder Head Assembly

The Chevrolet Performance LS3 Cylinder Head Assembly (P/N 12629063) is engineered for LS family engines featuring a 4.000-inch bore or larger. Constructed from durable 319-T5 aluminum alloy, these heads boast "as cast" L92-style ports and 68.4cc combustion chambers. They are equipped with 2.165-inch intake valves and 1.590-inch exhaust valves, supporting a maximum valve lift of 0.550 inches. While offering significant performance enhancements, it is important to note that specific fitment may apply to certain models, such as the 2016-2017 Chevrolet SS Base 6.2L V8 - Gas. Always verify compatibility with your specific vehicle configuration before installation. Installation may require specific gaskets and hardware, such as GM Factory LS7 MLS head gaskets and ARP head bolt kits for optimal strength and performance. While these heads are a direct fit for many LS applications, professional installation is recommended to ensure proper setup and maximize performance gains.