COMP Cams Trunnion Kit1/2inUpm Type Rocker

When you're rebuilding or upgrading your Small Block Chevrolet (SBC) or Big Block Chevrolet (BBC) engine, especially if you're running COMP Cams Ultra Pro Magnum™ or Ultra Pro Magnum™ XD rocker arms, this 1/2" Rocker Stud and Trunnion Retro-Fit Kit from COMP Cams is a solid choice. What you get in this kit is everything you need to switch over to larger 1/2" studs and refresh your rocker arms at the same time. It includes 1/2" ARP studs, new 1/2" replacement trunnions, 1/2" replacement polylocks, new bearings, and new snap rings.

This kit is designed to significantly increase the stiffness and stability of your valve train compared to a standard 7/16" stud setup. This improved stiffness helps achieve maximum valve motion, which is crucial for performance applications. It was originally developed for NHRA Stock Eliminator classes, making it a great option for racers whose rules don't permit stud girdles. It's also a smart choice for anyone looking for more rigidity with stud-mount rockers. Beyond its racing origins, this kit can also be used to update older COMP Cams Pro Magnum™ or Hi-Tech Stainless Steel Rockers™.

This retro-fit kit is compatible with a wide range of vehicles, including popular models like the Chevrolet Silverado 1500, Cadillac CTS, and Chevrolet Corvette, among many others. It's a comprehensive package that allows you to upgrade your rocker stud size while simultaneously rebuilding and freshening up your existing rocker arms, ensuring a more stable and consistent valve train operation.