Kits include KPMIﾮ or equivalent valve spring kit, a full set of Black Diamondﾙstainless steel standard size valves and are black nitride coated, H.T. (Heat Treated) steel valve keepers and valve stem seals (where applicable) for engine applications listed, Black Diamondﾙ valves are one piece forged stainless steel that are fortified by a special German process to improve wear properties and reduce friction, White Diamondﾮ valves are CNC machined from one-piece forging of either EV8 stainless steel or Inconel-751 and are hard chromed with 360ﾰ anode to produce a hard chrome finish, Compatible with leaded and unleaded fuels, Sold as complete kit for one engine, Made in the USA