Comp Cams .030 X 1.640 Spring Shim

Spring Shims: .030" Thickness, 1.640" O.D., .635" I.D.

These .030" thick Valve Spring Shims with 1.640" outside diameter and .635" inside diameter are used to equalize the installed height of valve springs. Made from the highest quality shim stock, these shims are heat treated to stand up to radical cam lobes. Kits are also available.