Supertech Performance SIVN-2304D Intake/Exhaust Engine Valve

Supertech Performance brings over 20 years of manufacturing expertise to their precision-engineered engine valves. Developed in close collaboration with professional engine builders, each valve undergoes intensive testing to deliver superior flow rates, long-term durability, and consistent quality for both street and race applications. Supertech valves are sold individually — order the exact quantity your engine requires (e.g., order 16 for a 16-valve engine).

Material Options:

• Stainless Steel (EV8 / 21-4N Alloy): One-piece forged construction for maximum strength and reliability. Supertech primarily uses EV8 (21-4N) stainless alloy for both intake and exhaust valves, with additional alloys and specialized heat treatments available for specific applications.
• Inconel 751 Nickel-Base Alloy: Designed for exhaust valves operating under extreme heat conditions — ideal for turbocharged or supercharged engines where exhaust temperatures are significantly elevated.

Protective Coating Options:

• Chrome Coating: A 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 engineered to meet the unique demands of every engine build — from naturally aspirated street engines to forced-induction race applications. Each valve is manufactured to tight tolerances, ensuring consistent seating, optimal flow, and reliable sealing cycle after cycle.