Washer Shims 1.350 x .012 x 1.200 Ring (10pk)

The Washer Shims 1.350 x .012 x 1.200 Ring (10pk) from Penske Racing Shocks is a precision valve component engineered for serious suspension tuning and shock absorber rebuilds. These steel washers are essential for mechanics and performance enthusiasts who demand repeatable damping characteristics across a wide range of driving conditions. Whether you're restoring a race shock, fine-tuning compression and rebound circuits, or building a custom suspension setup, these shim rings provide the stack consistency that separates amateur work from professional-grade results.

Each shim in this 10-pack measures 1.350 inches in outer diameter with a 1.200-inch inner ring bore and a precise 0.012-inch thickness, machined from hardened steel to maintain dimensional stability under extreme pressure cycles. These valve-disc shims work by controlling oil flow through shock internals—the specific thickness determines spring rate and deflection under load, directly affecting damping response. The 10-piece quantity allows for multiple configurations within a single shock or across an entire suspension system, enabling you to dial in valving curves that match your vehicle's weight distribution, ride height, and intended use without replacing entire shock units.

Penske Racing Shocks shims are trusted by suspension shops, track mechanics, and OEM rebuilders for street cars, road course platforms, and off-road applications where precise damping control is non-negotiable. Installation requires careful stacking and seating against shock pistons and valve bodies—improper assembly voids performance benefits. These shims are ideal for buyers repairing performance shocks, experimenting with valving stiffness, or maintaining critical race suspension systems where OEM replacements aren't cost-effective. Verify shim dimensions against your shock assembly drawings before ordering to ensure proper fit within your specific shock cartridge.