Spring Shims - 1.500 OD .020 Thick

Spring Shims - 1.500 OD .020 Thick are precision valve spring shims engineered for high-performance racing and engine building applications where exact valve train geometry is critical. These shims serve as spacers between valve springs and their seats, allowing tuners and mechanics to fine-tune spring pressure, pre-load, and resonant frequencies without replacing entire spring assemblies. For engine builders, circle track racers, and performance shops, valve spring shims are essential components for dialing in optimal lift, duration, and overall cam profile compatibility.

Constructed from hardened steel, these shims feature a 1.500-inch outer diameter with a precisely controlled 0.020-inch thickness and 0.570-inch inner diameter bore. The 0.020-inch thickness allows for incremental adjustments to spring load while maintaining structural integrity under high-RPM conditions and thermal cycling. This set includes 16 individual shims, providing flexibility to adjust multiple valves or make progressive adjustments across an entire cylinder head. Steel construction ensures durability and consistent performance across varying engine temperatures and boost conditions.

These shims are ideal for enthusiasts upgrading to aftermarket camshafts, tuning spring pressures on modified engines, or compensating for wear in valve train components. Installation is straightforward—shims stack directly under the valve spring assembly—making them compatible with most conventional pushrod and overhead cam engine designs that accept 1.500-inch OD spring hardware. Whether you're optimizing a street performance build or fine-tuning a racing engine, having a set of precision shims on hand ensures you can make critical adjustments without extended downtime or expensive component replacements.