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The COMP Cams 0.030" valve spring shim with a 1.640" outside diameter and 0.635" inside diameter is used to equalize installed spring heights and improve valvetrain consistency. Fabricated from high-quality shim stock and heat-treated to endure radical cam lobe profiles, it helps maintain uniform spring seat height across cylinders. Offered singly or as part of kits for complete setups.
COMP Cams Spring Shim .030 X 1.640
