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

The COMP Cams 1.500 O.D. Spring Shims with .645 I.D. and .060 thickness represent precision valve train components engineered for engine builders and performance technicians. These steel shims are supplied as a set of 16 units, each manufactured to exacting tolerances to maintain consistent valve spring pressure across your engine's valvetrain. Shim selection is critical in high-performance and racing applications where valve spring preload directly affects cam timing stability and engine reliability.

The .060-inch thickness specification allows precise micro-adjustments to installed spring height, a parameter that controls valve spring tension and ensures your cam profile operates within design parameters. The 1.500-inch outer diameter and .645-inch inner diameter configuration accommodates standard small-block valve spring packages common in street performance and competition engines. COMP Cams shims are manufactured from hardened steel to resist deflection and wear under the cyclical loading conditions inherent in high-RPM operation. Proper shim selection prevents valve float, spring surging, and premature component failure—factors that directly impact engine longevity and performance consistency.

This 16-piece set serves technicians building or servicing engines requiring multiple shim combinations for valve train optimization. Whether you're assembling a street engine, competition platform, or high-performance restoration, having a range of shim thicknesses available reduces downtime and ensures your final installed spring height meets cam manufacturer specifications. Engine builders and performance shops rely on COMP Cams valve train components for their dimensional accuracy and consistency across multiple production runs.

Valve spring shim selection is a foundational step in any serious engine build. The correct shim thickness maintains the precise spring preload your cam profile was engineered around, directly supporting proper valve sealing, timing accuracy, and durability. COMP Cams' reputation in the performance engine community reflects decades of OEM and aftermarket engineering where precision manufacturing standards are non-negotiable.