Kibblewhite Precision Engine Valve Kit 20-23150Kits include KPMI or equivalent valve spring kit, a full set of Black Diamond stainless steel standard size valves, H. T. Steel valve keepers and valve stem seals (where applicable) for engine applications listed All valves are impregnated by a special process to a depth of . 002in. with a surface buildup of . 0002in. This process improves wear properties, reduces friction and provides resistance to corrosion and wear Compatible with leaded and