New from Howards Cams – the Extreme Black Nitride Treated Valves. This treatment makes these valves perfect for nitrous, turbo, and supercharged engines. See more details below.
Howards Cams has introduced a line of ultra-performance, nitride-treated valves. These Extreme Black Valves feature a gloss-black nitride treatment that’s engineered for high-rpm and high-horsepower applications, making them ideal for nitrous, turbo, and supercharged engines. For naturally aspirated motors, Extreme Black Valves will yield much greater cylinder flow and therefore greater horsepower gains.
The valves start as a one-piece, forged from super Alloy 21-4N high nickel stainless steel alloy, and are CNC finished to strict tolerances, making them the choice for the most demanding race classes. The black nitride micro-hardness is harder than the stainless steel base material— a process that can’t be matched in terms of surface hardness. The nitride surface finish is smoother than that of chromed stems, creating less friction between the stem and guide, reducing power loss due to valve-guide friction. Nitride is not a coating, but rather a bonding process wherein it becomes part of the base steel so that it won’t wear off.
Howards Cams Extreme Black Valves are available for Chevy small and big block cylinder heads.
- Gloss-black nitride treatment
- Engineered for high-rpm and high-horsepower applications
- Ideal for nitrous, turbo, and supercharged engines