COMP Cams 1.640" O.D. Spring Shim Kit 931121 digressive piston which reacts to

digressive piston which reacts to changing road conditions

Includes crankshaft seal and timing cover gasket

Direct Replacement Part

Gauge measures from 65" to 115" in 1/4" increments

COMP Cams 1.640" O.D. Spring Shim Kit 931121 digressive piston which reacts toThis shim kit contains . 015", . 030" and . 060" thick Valve Spring Shims with 1. 640" outside diameter and . 635" . 650" 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. This COMP shim kit includes a number of 1. 640" diameter shims of various thickness. This kit includes 16 . 015" thick shims,