Supertech Performance SEVI-1043D Engine Valve High-Performance Replacement

Supertech Performance brings over 20 years of manufacturing expertise to the SEVI-1043D engine valve, engineered for high-flow performance, long-term durability, and consistent quality. Developed through intensive testing and close collaboration with professional engine builders, Supertech valves are continuously refined to meet the demands of both street and competition applications. Sold individually — order the exact quantity required for your application.

Material Options:

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

Protective Coatings:

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

Supertech Performance valves are manufactured to exacting tolerances, ensuring a precise fit and optimal flow characteristics for high-performance engine builds. Whether building a naturally aspirated race engine or a forced-induction street application, the SEVI-1043D delivers the reliability and performance that professional engine builders trust.