The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves
Conversion to Black Diamond™ stainless steel valves offers up to twice the life of the stock titanium valves
No loss in performance
Kit includes: piston, rings, clip and pin, Cometic top end gasket kit, Black Diamond engine valves (standard size) and dual spring titanium retainer springs (.395" lift intake, .0370" lift exhaust)
