Comp Cams 4743-16 Valve Spring Shims .030"
These .030" thick Valve Spring Shims with 1.437" outside diameter and .645" 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. Set of 16 shims.
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Great product, does exactly what they are designed to do, id recommend buying two bags.