Supertech Performance SIVN-1015 Performance Engine Intake/Exhaust Valve

Supertech Performance brings over 20 years of manufacturing expertise to their engine valve lineup, working directly with professional engine builders to deliver high-flow, durable valves engineered for demanding performance applications. The SIVN-1015 is sold per valve — order the exact quantity required for your engine build.

Construction & Materials:

• Stainless Steel (EV8 / 21-4N Alloy): One-piece forged construction for maximum strength and reliability. Supertech primarily uses EV8 (21-4N) stainless for both intake and exhaust valves, with additional alloys and heat treatments available for specialized applications.
• Inconel 751 Nickel-Base Alloy: Used for exhaust valves subjected to extreme temperatures, such as those found in turbocharged or supercharged engine builds where standard stainless steel is insufficient.

Protective Coatings:

• Chrome Coating: A widely used finish in 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.

Key Features:

• One-piece forged valve construction for superior strength
• High-flow design optimized for performance engine applications
• Available in stainless steel (EV8/21-4N) and Inconel 751 material options
• Chrome or Black Nitride coating options for thermal and wear protection
• Engineered for turbo, supercharged, and high-RPM naturally aspirated builds
• Sold individually — order the quantity matching your engine's valve count

Supertech Performance valves are a trusted choice among competitive engine builders seeking a balance of high flow, durability, and precision manufacturing quality across a wide range of motorsport and street performance applications.