Spring Seat Shim (.015″ / .030" / .060") Hardened Valve Spring Shims for Pro and Street Performer Valve Springs. When installing new valve springs, it is very crucial to get the springs all set up equally for proper valvetrain geometry and longevity...

Rocker Arm Shim (.030″ / .060") Have you ever checked your rocker arm alignment to see if it rides completely on the cam lobe? You are not alone; most people don't check it either!! As parts wear or even get replaced the rocker arm alignment can...