PRC 260cc LS3 CNC-Ported Cylinder Heads

The Texas Speed PRC 260cc cylinder heads provide a high-flow solution for 2007-and-newer rectangle port LS-based 6.2L engines, including LS3, L99, LSA, LS9, L92, L9H, and L94 platforms. These 100% USA-cast and machined heads are designed to significantly outperform ported GM castings by utilizing smaller intake port volumes that boost port velocity, resulting in broader powerbands and improved daily drivability. They are engineered for 4.000-inch and larger bores and feature extra-thick deck surfaces to improve head gasket sealing during boosted or nitrous applications. The heads incorporate a 13-degree valve angle, which offers increased piston-to-valve clearance to accommodate larger camshaft profiles or higher-compression domed pistons. Each pair arrives fully assembled with 2.185-inch lightweight hollow-stem intake valves, 1.60-inch stainless steel exhaust valves, CHE bronze guides, and a TSP .660-inch spring kit utilizing PAC valve springs and titanium retainers. Compatibility extends to both 6-bolt aftermarket blocks and factory 4-bolt configurations without interference. Additionally, these heads are compatible with LS2, LQ4, and LQ9 blocks when paired with a compatible rectangle-port intake manifold and LS3-style rocker arms. The heads feature integrated rocker pedestals to accept factory-style LS3 rocker arms.