14mm Shock Shim U-Shaped 3/8in 10pk

The 14mm Shock Shim U-Shaped 3/8in 10pk from ALLSTAR PERFORMANCE is a precision suspension tuning component designed for serious bracket racers, street rod builders, and performance suspension enthusiasts. These shims function as critical load-distribution elements in shock absorber assemblies, allowing fine-tuning of spring rates and dampening characteristics without replacing expensive shock bodies. Whether you're dialing in a drag car, street machine, or circle track competitor, shock shims are non-negotiable for achieving repeatable performance and consistent suspension geometry across multiple heat cycles and track sessions.

Each U-shaped shim measures 14mm in diameter with a 3/8-inch center bore, engineered to stack inside shock bodies and progressively increase spring preload. The U-profile design ensures even load distribution across the shock piston and rod assembly, preventing uneven wear and premature seal degradation. This 10-pack configuration gives you multiple shim thicknesses or redundant pieces for testing and tuning sessions, enabling methodical suspension setup without frequent reordering. ALLSTAR PERFORMANCE's consistent manufacturing tolerances ensure reliable stacking and predictable spring rate increments across the entire package.

These shims are essential for competitors running adjustable coil-over or traditional shock setups who need granular control over corner weights and ride frequency. Applications include drag racing, road racing, autocross, and street rod suspension refinement where small changes in spring preload directly impact launch characteristics, cornering balance, and tire contact patch consistency. Proper shim selection requires understanding your shock bore size, current spring rates, and target weight distribution—consult your shock manufacturer's specifications and suspension tuning guide before installation. Store and handle shims carefully to avoid dings or deformation that would compromise stacking accuracy and suspension performance.