Supertech Performance TEVN-1040-12 Black Nitrided Exhaust Valves for Toyota 5VZ-FE V6

These high-performance racing valves are manufactured using one-piece forged stainless steel construction, providing exceptional strength and durability for demanding performance applications.

Key Specifications:

• Head diameter: 27.50mm (standard size)
• Stem diameter: 5.96mm
• Overall length: 94.9mm
• Material: EV8 (21-4N) stainless steel
• Finish: Black nitrided coating

Features and Benefits:

• One-piece forged stainless steel construction ensures maximum reliability under high-stress conditions
• Black nitride hardening treatment provides a smooth surface with reduced friction between stem and guide
• Microhardness exceeds 800HV minimum while maintaining good ductility beneath the hardened layer
• Superior surface finish compared to chrome coating results in improved longevity and performance
• Special heat treatment process optimized for proper hardness characteristics
• Designed for high flow rate to maximize engine power output

Supertech Performance leverages over 20 years of manufacturing experience and works closely with engine builders to continuously refine their valve designs. Each valve undergoes intensive testing to ensure it meets the demands of racing and high-performance street applications. This complete set provides all exhaust valves needed for a full Toyota 5VZ-FE engine build or rebuild.