Tensilite® valves are CNC machined from one-piece forgings of 6AL4V or 6-2-4-2 titanium alloy Finished with a CrN PVD coating that has a low coefficient of friction, and is impact, abrasion, and corrosion resistant Made in the USA - Yamaha YZ 250 F (2019, 2022, 2020, 2024, 2025, 2021, 2023)