Description
Valve shim selection directly impacts your engine’s valve clearance, compression ratio, and overall top-end performance. PROX Valve Shims are precision-machined to exact tolerances and heat-treated for superior hardness, eliminating premature wear that compromises timing and power output. Whether you’re dialing in a built engine or maintaining race-ready specifications, these shims deliver the consistency and durability required for serious track and street applications.
- 5-piece pack
- Precision machined tolerances
- Heat-treated hardness
- Reduced wear rate
- MPN 29.948220
- Increased durability
- Exact size matching









