Supertech Performance HEVN-1030D High-Performance Engine Valve

Supertech Performance brings over 20 years of precision manufacturing experience to their engine valve lineup. Developed through intensive testing and close collaboration with professional engine builders, Supertech valves are engineered for high flow rate, durability, and consistent quality across a wide range of performance applications.

Supertech recognizes that every engine has unique demands, which is why their valves are available in multiple materials and configurations to suit any build — from street performance to forced induction racing applications.

Available Materials:

• Stainless Steel (EV8 / 21-4N Alloy): One-piece forged construction for superior strength and reliability. Supertech primarily uses EV8 (21-4N) alloy for both intake and exhaust valves, with additional alloy options and heat treatment variations available for specialized applications.
• Inconel 751 Nickel-Base Alloy: Designed for extreme-heat exhaust applications, including turbocharged and supercharged engines where exhaust temperatures exceed the limits of standard stainless steel.

Surface Treatment Options:

• Chrome Coating: A widely used finish in performance valve applications, providing enhanced surface hardness and wear resistance.
• Black Nitride Treatment: A hardening surface treatment that produces a smoother finish than chrome, reducing friction between the valve stem and guide for improved longevity and performance.

Sold individually — per valve. Please order the exact quantity required for your engine build. For example, a 16-valve engine requires a quantity of 16.