The COMP Cams® GM LS Trunnion Upgrade kit is designed to upgrade the stock needle bearings with full complement roller trunnions for high RPM race applications. These kits include heavy-duty billet steel rocker arm trunnions, high needle count roller bearings, retaining rings and an optional magnetic installation tool. The magnetic installation tool allows for one-handed installation, and its cylindrical construction is perfect for use in an arbor press, vice or c-clamp. Everything necessary for a complete installation is included. The Rocker Arm Trunnion Upgrade Kit will improve the reliability of your LS & Gen V LT rocker arms and is a must when upgrading to a high performance camshaft or higher load valve springs.