Product Details Black Diamond? valves are CNC machined from one-piece forgings of EV8 Stainless Steel Black Diamond? proprietary multi-stage process reduces friction, and provides superior resistance to corrosion and wear Made in the U.S.A. Product Videos Custom Field Product Reviews Write a Review Write a Review × Kibblewhite Kibblewhite #82-82363 - Intake Valve Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *