Supertech Performance MAIVN-2308D-8 Black Nitride Intake Valve Set +2.5mm Oversize 37.5mm

The Supertech Performance MAIVN-2308D-8 is a premium black nitride intake valve set designed for Mazda MZR and Ford Duratec 2.0L, 2.3L, and 2.5L engines. This complete 8-valve kit features an oversized 37.5mm head diameter (+2.5mm over stock) with a dish face design, providing improved airflow and performance for high-performance and racing applications.

Key Specifications:

• Head Diameter: 37.5mm (+2.5mm oversize)
• Stem Diameter: 5.48mm
• Length: 103.40mm
• Face Type: Dish
• Quantity: 8 valves per set
• Single groove design

Premium Construction:

• Manufactured exclusively from enhanced EV8 (21-4N) stainless steel, the highest grade available
• Black nitride coating provides a hardening treatment for superior wear resistance
• Features undercut and back cut modifications for optimized valve performance
• One-piece forged stainless steel construction for ultimate strength and durability

Supertech relentlessly tests new materials to provide valves with unsurpassed fatigue resistance, making these valves ideal for drag racing, rally, road racing, and other demanding motorsport applications. The oversized design improves airflow characteristics while the black nitride surface treatment reduces friction and increases valve longevity compared to standard chrome coatings.