Hot Cams Shim Conversion Kit Polaris The product serves as an ideal match for OEM valves, springs and camshafts. It is compatible with high-performance aftermarket camshafts, thus offering broad usage. Features: Diamond Like Carbon (Dlc) coated for extended durability and performance over OEM For use with OEM valves, springs, camshafts and aftermarket high performance camshafts Includes 8 buckets and 8 retainers Requires use of 9.48mm valve shims (sold separately) Recommended to be used with Hot Cams Shim Kit P/N 68-2072