Supertech Performance HEVN-1020F-8 Black Nitrided Exhaust Valves for Honda K20/K24

These high-performance valves feature a black nitride coating, a hardening treatment that provides superior durability and reduced friction compared to traditional chrome-coated valves.

Key Specifications:

• Head diameter: 30.00mm (standard size)
• Stem diameter: 5.45mm
• Length: 108.65mm
• Material: Black nitrided stainless steel
• Valve type: Exhaust

Performance Features:

• Black nitride coating creates a harder, smoother surface than chrome finishes
• Reduced friction between stem and valve guide for improved high-RPM performance
• One-piece forged construction for maximum strength and reliability
• Optimized for high flow rate and extended service life
• Manufactured using EV8 (21-4N) stainless steel alloy with specialized heat treatment

Supertech Performance leverages over 20 years of manufacturing experience and continuous collaboration with engine builders to produce valves that meet the demanding requirements of performance and racing applications. These valves are ideal for engine rebuilds, cylinder head upgrades, or replacement during valve train maintenance on Honda K-series engines found in vehicles like the Acura RSX, Honda Civic Si, and other K20/K24-equipped models.