The CHE LS3 Shaft-Mount Trunnion Kit (Part #CHE-3770-SM) is the ultimate valvetrain upgrade for high-performance GM LS rectangle-port engines. Specifically designed for 6.0L and 6.2L heads including LS3, L99, L76, L92, L96, and LSA, this kit delivers unmatched rocker arm stability under extreme load, high RPM, and aggressive camshaft conditions. This listing includes not only CHE's premium shaft-mount conversion hardware, but also a set of precision-engineered LS3 rocker arm bolts — eliminating the guesswork and ensuring complete, secure installation. The kit converts traditional pedestal-mount rockers to a full shaft-mount design, reducing deflection and isolating harmonics for consistent valve timing and improved durability. CHE's floating bronze bushings provide smooth rocker travel with minimal wear, while hardened shafts and high-retention snap rings ensure long-term reliability. This kit is a must-have for LS enthusiasts pushing their builds in racing, boosted, or high-stress environments. Rocker arms not included.