Have Questions About Stock Or Need To Confirm Fitment?
Always the correct part
Can't Find Your Part
Send the part # and get a quote
Performance matched parts
Free shipping on select parts
Extreme Black Exhaust Valve; Chevy 265-400 1.600 11/32 Howards Cams 16011N - Howards Cams - 16011N
Extreme Black Chevrolet 265-400 Exhaust 1.600 11/32 Valve Engineered for high rpm and high horsepower applications. Extreme Black feature a gloss black nitride and are perfect for high temperatures (they run cooler which improves valve life), 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. The black nitride reduces power loss due to less valve-guide friction. Nitriding is not a coating, it is a process where it actually becomes part of the steel.
|Level1||Level 1: Engine|
|Level2||Level 2: Valve Train Components|
|Warranty||6 months from the date of original retail purchase. Replace to the original purchaser only|