LS9 Cylinder Head Gen-4

The LS9 Cylinder Head Gen-4 from Chevrolet Performance represents precision engineering built for high-performance LS engine builds. Designed for serious enthusiasts and professional mechanics, this cylinder head is the OEM component that powered the Corvette ZR1 and Cadillac CTS-V performance platforms. Whether you're restoring a stock LS9 engine, upgrading an existing LS platform, or building a custom crate motor, the LS9 cylinder head delivers the flow characteristics and combustion chamber geometry that made the LS9 one of the most formidable naturally aspirated powerplants ever produced.

This fourth-generation LS9 head features a fast-burn chamber design with 2.00-inch intake and 1.55-inch exhaust valves optimized for maximum flow rates and efficient scavenging. The casting includes integral cooling passages and provisions for direct fuel injection compatibility, along with pre-machined bolt holes and alignment surfaces that ensure proper sealing and valve train geometry when mated to LS9 block configurations. Weighing 4.11 lbs per head, the component maintains the tight tolerances and surface finish required for reliable high-RPM operation.

Mechanics and engine builders select the LS9 Cylinder Head Gen-4 for OEM replacement applications, complete LS9 restoration projects, and high-output street or competition builds that require proven performance. This cylinder head is ideal for those looking to maximize the potential of their LS9 engine, ensuring compatibility with various LS9 crate builds and applications.