Supertech Performance MAIVN-2301D Black Nitrided Intake Valve for Mazda/Ford Duratec 2.0L/2.3L

The Supertech Performance MAIVN-2301D is a high-performance black nitrided intake valve engineered specifically for Mazda and Ford Duratec 2.0L and 2.3L engines. Manufactured from enhanced EV8 (21-4N) stainless steel, this valve represents the highest grade of steel available for maximum strength and durability in demanding applications.

Key Specifications:

• Head Diameter: 35.00mm (standard size, dish face)
• Stem Diameter: 5.97mm (6mm) with taper to 5.5mm at tip
• Overall Length: 103.40mm
• Material: EV8 (21-4N) stainless steel with black nitride coating
• Groove Type: Single groove
• One-piece forged construction for superior strength

Performance Features:

• Black nitride coating provides a harder surface and smoother finish for reduced friction
• Valve tips hardened beyond 52HRc for extended durability
• Stem superfinishing reduces surface roughness by up to 66% compared to chrome-coated valves
• Hardened seats and swirl polish for optimal performance
• Undercut and backcut design for improved airflow

Supertech valves are developed using over 30 years of experience combined with state-of-the-art testing equipment including ultrasonic tests, x-rays, laser measurement equipment, and computerized Finite Element Analysis (FEA). Each valve is manufactured to strict dimensional tolerances and undergoes extensive testing with top engine builders to ensure maximum performance and reliability for racing and high-performance street applications.

Note: Price is per valve. Eight valves required for complete set.