As with all other parts in the valvetrain, the area where the spring sits takes a beating. The old standard shims simply will not hold up to the extreme pressures and high rpm found in today's performance engines. COMP Cams offers this set of valve spring shims to solve this problem and eliminate failures.

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Dart Valve Spring Shim, 0.642 in. I.D., 1.625 in. O.D., 0.030 in. Thick Shim, Each

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MANLEY Valve Spring Shims, Hardened, Steel, 1.625 O.D., .015 in. Thick, Set of 50

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