Supertech Performance HIVN-1006F Black Nitrided Intake Valve

The Supertech Performance HIVN-1006F is a Black Nitrided one-piece forged stainless steel intake valve engineered for high-performance and motorsport applications. With a 35.00mm head diameter (standard, flat face), 5.48mm stem diameter, and 106.85mm overall length, this valve delivers precise fitment and exceptional durability under demanding conditions.

Supertech's Black Nitride hardening treatment produces a surface microhardness of 800HV minimum, exceeding the base stainless steel material while retaining ductility beneath the nitrided layer. The result is a smoother stem surface than chrome-coated alternatives, reducing friction between the valve stem and guide for improved wear resistance and longevity — particularly popular in high-revving Japanese and European performance engines.

Key Specifications:

• Head Diameter: 35.00mm (standard) — flat face
• Stem Diameter: 5.48mm
• Overall Length: 106.85mm
• Material: Black Nitrided stainless steel (EV8 / 21-4N alloy)
• Valve Type: Intake
• Construction: One-piece forged for superior strength and reliability
• Surface Treatment: Black Nitride — minimum 800HV microhardness

Note: Supertech valves are sold individually (per valve). Order the quantity equal to the total number of intake valves required for your engine build.