Supertech Black Nitride Intake Valves | Honda K20 Engine

Honda K20 Black Nitride Intake Valves by Supertech Production of our racing valves begins with a one piece forging, where the head of the valve is forged under a slow two step process to keep a good material grain flow. The forging is then CNC machined in several steps to ensure the precision of the final dimensions. We then do another heat treatment for stress relieving followed by a nitride hardening treatment (or coating process depending on the application). Lastly, we do one more grinding, followed by our patented Superfinishing of the surface to ensure that each valve is free of any imperfections and the dimensions are precise. Features High quality one piece valve design Maximized durability through higher fatigue resistance and tensile strength. Each valve tip is hardened beyond 52HRc. Manufactured to strict tolerances Superfinish  reduces the surface roughness to 1/3 of our chrome coated valve. The end result… unsurpassed performance and durability. Optimum high flow rates are achieved by ensuring that our valves are manufactured with the best angles for each application.  Applications Honda K20 Engines What's In The Box? 1 - Set of Black Nitride Intake Valves Warranty Manufacturer Standard Warranty