1.500 O.D. Spring Shims .645 I.D. .060 Thickness

The COMP Cams 1.500 O.D. Spring Shims are precision-engineered components designed for performance mechanics and engine builders who require exact control over spring preload and installed height. These shims are used beneath valve springs to fine-tune compression and maintain consistent spring rates across the valvetrain.

Manufactured with a .645 inner diameter and .060 thickness, these shims match the outer diameter specification of 1.500 inches, allowing for seamless integration with compatible spring assemblies. The .060 thickness enables precise adjustments to valve spring installed height, which is crucial when working with aftermarket components that alter pushrod length. Precision tolerancing ensures consistent seating and prevents spring bind.

These shims are particularly beneficial for builders optimizing high-performance engines, as proper shimming directly impacts valve seating geometry and overall engine reliability. While they are commonly used in various applications, including small-block Chevy and Ford engines, it is essential to verify compatibility with specific builds. Installation requires careful measurement of the current installed height before shimming, and multiple shims can be stacked if additional thickness is needed.