Howards "Extreme Black" Severe Application Valve, 2.250" Int., 11/32", +.250" Length, Each

Howards "Extreme Black" Severe Application Valves

Engineered for high rpm and high horsepower applications. Extreme Black valves feature a special black nitride process and are perfect for high temperatures (they run cooler which improves valve life). Great for nitrous, turbo and supercharger applications. For naturally aspirated motors these valves will give you a much greater cylinder flow for good horsepower gains. They start as a one piece forged, high temperature, high nickel, stainless steel alloy. CNC finished to strict tolerances, making these valves the choice for the most demanding race classes. The black nitride micro-hardness is higher than the stainless steel base material. No process can match it for surface hardness. Surface finish is smoother than with chromed stems, having less friction between stem and guide. Nitriding is not a coating, it is a process where it actually becomes part of the steel.