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The COMP Cams 0.030" valve spring shims with a 1.437" outside diameter and 0.645" inside diameter are used to equalize installed spring heights and ensure stable valvetrain operation. Heat-treated and crafted from premium shim stock to endure radical cam profiles, they preserve consistent spring seat height during aggressive use. Kits are available for matching multiple cylinders as required.
COMP Cams Spring Shims .030 X 1.437
