Kit includes complete top end gasket kit, full set of KPMI® standard valves, high performance titanium spring kit, complete set of valve guides, and Viton® valve stem sealsTop end gasket kit includes base gaskets, engine case gaskets, exhaust gaskets, head gaskets and necessary o-rings and washersC630 valve guides are a blend of copper, nickel, and aluminumC674 valve guides are a softer Manganese that are easily reamed Black Diamond™ valves are a one pieced forged stainless steel valve that are impregranted by a special German process to improve wear properties and reduce frictionWhite Diamond® valves are fully CNC machined from one-piece forging of either EV8 Stainless Steel or Inconel-751 material, and are hard chromed with a 360° anode to produce the highest possible grade of a hard chrome finish