Black Diamond Exhaust Valve Hd Evolution 87 99

All KPMI Black Diamond? stainless steel valves are impregnated by a special German process to a depth of .002*, with a surface build up of .0002*. This *Black Diamond?* process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Black Diamond? Valves are light, strong, one-piece forgings with profiles that provide excellent flow characteristics.