Supertech Performance TIVN-1031 Black Nitrided Intake Valve 34mm

The Supertech Performance TIVN-1031 is a Black Nitrided intake valve engineered for high-performance and racing applications. With a 34.00mm head diameter, 5.48mm stem diameter, and 111.45mm overall length, this valve is manufactured from high-nickel content SAE EV8 (21-4N) stainless steel alloy in a one-piece forged construction for maximum strength and reliability.

Key Features:

• One-Piece Forged Construction: Manufactured from a single piece of SAE EV8 (21-4N) high-nickel stainless steel alloy for superior structural integrity and fatigue resistance
• Black Nitride Coating: Applied to the entire valve (not just the stem), the black nitride treatment achieves a minimum surface microhardness of 800HV while maintaining ductility beneath the hardened layer
• Reduced Stem Friction: The nitrided surface finish is smoother than chrome-coated stems, resulting in less friction between the valve stem and guide — a particular advantage at high RPM where friction-related power losses are greatest
• Swirl Polished Head: Promotes improved airflow and combustion efficiency
• Undercut Stem: Reduces valve weight and improves flow characteristics in the port
• Impact Resistance: The nitride layer bonds at a microscopic level to the base material and will not flake or fracture upon valve-to-piston contact

Supertech valves undergo a specialized heat treatment process calibrated to the specific demands of each engine application, ensuring optimal hardness and durability under race conditions. This valve is sold individually (per valve) — order the quantity equal to the number of intake valves required by your engine.