TOYOTA 4AGE 16v / Atlantic / Corolla exhaust valve ST-TEVN-1019

The production of our racing valves starts with a one-piece forging, where the valve head is forged in a slow two-step process to maintain a good material flow. It is then CNC machined in several steps to ensure the final dimensions are accurate. Then we perform another heat treatment to stress relieving followed by a nitride hardening treatment (or coating process depending on the application) Finally, we do one more grinding followed by a patented surface finish to ensure that each valve is free of any imperfections and the dimensions are precise. In every valve design, we strive to maximize durability through higher fatigue resistance and tensile strength. Each valve tip is hardened to more than 52 HRC. You are unlikely to find our competitors' valves with more stringent dimensional tolerances than our Supertech valves. plates with equally stringent tolerances and you won't find a better seal, better performance, and an easier-to-install solution anywhere! When our Superfinish coating is paired with our black nitrogen, it reduces the surface roughness to 1/3 of our chrome valve. The end result ... unmatched performance and durability. / p> Suitable for: TOYOTA 4AGE 16v / Atlantic / Corolla Dimensions: Head Diameter: 25.50 mm (std) Shaft Diameter: Length: The production of our race valves begins with a one-piece forging where the valve head is forged in a slow two-step process to maintain a good material flow.Then it is machined on the CNC in several stages to ensure the precision of the final dimensions.Then, we perform another thermal treatment for relaxation, followed by nitride curing (or coating process depending on the application) .Finally, we perform one more grinding followed by a patented surface finish to ensure that each valve is free of imperfections and the di mensions are precise.With each valve design, we strive to maximize durability due to the higher resistance to fatigue and tensile strength.Each valve tip is hardened above 52 HRc.It is unlikely that you will find valves from our competitors with stricter dimensional tolerances than our Supertech valves.Combine it with ready valve seats with equally strict tolerances and you will not find better sealing, better performance and easier to install solutions anywhere! When our Superfinish coating is combined with our black nitrogen, it reduces the surface roughness to 1 / 3 of our chromed valve The end result ... unmatched performance and durability./p>Fits: TOYOTA 4AGE 16v / Atlantic / CorollaDimensions: Head diameter: 25.50 mm (std) Stem diameter: Length: