Supertech Performance HIVN-1020F-8 Black Nitrided Intake Valves for Honda K20/K24

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

Technical Specifications:

• Head Diameter: 35.00mm (standard size)
• Stem Diameter: 5.48mm
• Overall Length: 108.85mm
• Valve Face: Flat face design
• Material: EV8 (21-4N) stainless steel with black nitride coating
• Groove Type: Single groove

Key Features:

• Black nitride treatment reduces friction at high RPM for improved performance and longevity
• Special heat treatment process optimizes hardness for demanding engine applications
• Microhardness rating exceeds 800HV minimum while maintaining excellent ductility
• Smoother surface finish than chrome-coated valves for reduced stem-to-guide friction
• One-piece forged construction eliminates weak points and ensures consistent quality

Supertech Performance valves are trusted by professional racing teams across NASCAR, IRL, road racing, drag racing, rally, and Formula One applications. The black nitride coating is particularly popular for Japanese and European engines, offering superior wear resistance and thermal stability compared to traditional chrome coatings.