Supertech Performance SIVN-1052-2-8 Black Nitrided Intake Valve for Subaru FA20

These valves are manufactured from one piece of forged stainless steel EV8 (21-4N) alloy, providing exceptional strength and durability for demanding racing and performance builds.

Key Specifications:

• Head Diameter: 34.00mm (standard size)
• Stem Diameter: 5.46mm
• Valve Length: 105.00mm
• Material: Stainless Steel 21-4N with black nitride coating
• Groove Type: Single groove

Advanced Features:

• Black nitride coating provides superior surface hardness (800HV minimum microhardness)
• Smoother surface finish reduces friction between stem and valve guide
• One-piece forged construction for maximum reliability
• Special heat treatment process optimized for performance applications
• Hardened tips and seats for extended valve life

Supertech's black nitrided valves offer improved wear resistance and longevity compared to standard valves, making them ideal for drag racing, rally, road racing, and other motorsport applications. The black nitride coating maintains good ductility beneath the hard surface layer while reducing friction for improved performance and durability.