16mm Shock Shim U-Shaped 1/8in 25pk

The 16mm Shock Shim U-Shaped 1/8in 25pk from ALLSTAR PERFORMANCE is an essential tuning component for high-performance suspension systems and shock absorber calibration. These precision shims are designed for builders and mechanics who demand exact valving control over damping rates in custom shock builds, racing applications, and suspension modifications.

These U-shaped shims operate by restricting oil flow through shock valve stacks, directly controlling damping force curves. The 16mm diameter and 1/8-inch thickness profile fit standard shock valve assemblies, allowing you to stack multiple shims to achieve progressive or linear damping rates tailored to your suspension geometry and vehicle weight. ALLSTAR PERFORMANCE manufactures these shims to tight tolerances, ensuring consistent valve response and predictable handling characteristics across all shock adjustments.

The 25-pack quantity provides enough shims for multiple shock builds or extended testing and calibration sessions. This pack benefits suspension builders, race teams, and enthusiasts working on coilover systems, monotube shocks, and custom damper applications. Installation requires disassembly of the shock body and careful layering within the valve assembly—precision work best handled by experienced professionals.