Flywheel Shim Kit .090 Thick - GM LS Engines

The Flywheel Shim Kit .090 Thick for GM LS Engines is a precision component designed for builders and enthusiasts focused on achieving exact crankshaft geometry in high-performance LS applications. This kit is essential for those assembling stroker engines, correcting deck height mismatches, or fine-tuning harmonic balancer clearance, ensuring reliable power delivery.

Manufactured to strict tolerances, the .090-inch thickness allows for precise crankshaft end-play and optimized flywheel runout. The shim material is engineered to withstand high-RPM shock loads and thermal cycling, which is critical for performance applications. Proper flywheel shimming improves starter engagement geometry and reduces stress on the flywheel ring gear, enhancing drivetrain durability.

Engine builders, whether for street performance or track racing, rely on this shim kit during assembly to achieve OEM or tighter tolerances. It's an essential component for any LS swap, engine rebuild, or crate motor installation, especially when original equipment may be worn or mismatched.