NEW V2 Brian Tooley Racing (BTR) GM LS1/LS2/LS6/LS3 Rocker Arm Trunnion Upgrade Kit With Bolts - TK002 NOTE: INTERFERENCE WITH THE PASSENGER VALVE COVER BAFFLE ON SOME EARLY STYLE (1997-2003 VALVE COVERS) MAY OCCUR. The all new Trunnion Kit V2 features a Trunnion with pre-installed inner race bearings. The V1 kits have stood up to an enormous amount of abuse, but we decided to upgrade them to a pressed inner race comprised of 52100 Heat Treated Bearing Steel, over the more commonly used 8620 Carburized Steel found in our V1 kits and many OEM applications. Additionally, these feature a self oiling axle with priority feeding to the Trunnion itself. OEM rocker arms are prone to failure, which can result in needle bearings being dispersed through the engine. The BTR rocker arm trunnion upgrade kit replaces the OEM needle bearings with captive bearing design. This trunnion upgrade kit also allows for 360 degree rotation and eliminates the travel stops (which create problems with higher lift camshafts) in the original OE rocker design. Features: Fits All Stock LS Rocker Arms Does Include Bolts NOTE: Stock rocker arm bolts cannot be used, as they are slightly too long. Part Number TK002 Part Type Trunnion Kit Brand Brian Tooley Racing Engine Type Gen III/Gen IV *Item ships directly from Brian Tooley Racing.