Tilden Motorsports LS rocker arms are high-quality rocker arms that have a pedestal mount, roller fulcrum style, and are made of high-quality ductile iron construction to ensure long-lasting durability and performance. They are moly coated for wear resistance and smoother low friction operation. The loaded rocker arms come with the Tilden Motorsports LS Series retrofit trunnion upgrade kit pre-installed. Designed for high-rpm race applications. They include the rocker arm trunnions, rocker arm bearings, and rocker arm retaining rings for a complete installation. Keep your valvetrain reliable throughout the entire rpm range with this rocker arm set.