When setting the Spring height, Shims must be used to equalize the installed height of the Valve spring. COMP Cams® Spring Shims are made of the highest quality Shim stock and heat treated to stand up to the immense Pounding of the radical lobes of today's Cams.
Used To Equalize Installed Height Of Valve Spring
Made From The Highest Quality Shim Stock
Heat Treated To Stand Up To Radical Cam Lobes
Limited 1 Year Warranty