Engineered for high-RPM builds and turbocharged applications, the Brian Tooley Racing (BTR) LS3 Shaft Rocker Kit V2 dramatically stiffens LS valvetrains with its billet steel shaft system and pre-assembled BTR rocker bodies. It's built around a rugged steel stand with four shafts per head, each shaft made from genuine 52100 bearing steel, housing full trunnion bearings. The V2 design features shim-loaded shafts for simplified assembly and enhanced strength over snap-ring systems. Each rocker body secures with five fasteners to eliminate flex and reduce deflection—46% stronger than stock in FEA—and supports higher cam lift with an extended tip. Ideal for rectangle-port LS3, L99, LSA, LS9, L92, L76, and L77 engines (2007–2015). Fits OEM castings #821, #823, #5364. Bolt-in, swap your stock rockers, and unleash valve control like never before.