Supertech Honda K20/K24 Black Nitrided Intake Valve - Set of 8

Supertech HIVN-1020D-8 – Standard-Size Black-Nitrided Intake Valve Set (Honda K-Series)

Supertech’s HIVN-1020D-8 kit supplies eight 35 mm intake valves for Honda/Acura K-series engines (K20A/K20Z/K24). Each valve is forged from EV8 (21-4N) stainless steel and finished with a Black Nitride surface that improves hardness, lowers stem-to-guide friction, and resists high intake-air temperatures.

Key Features

• OE-size 35 mm head – direct replacement that drops into factory seats with no machining.

• Black Nitride coating (~52 HRC) – harder surface and reduced friction for longer guide life and higher RPM stability.

• One-piece forged stainless construction – excellent fatigue strength and crack resistance.

• Single-groove keeper – compatible with most Supertech and OEM retainer/spring kits.

• Precision CNC finishing ensures perfect concentricity and reliable sealing at extreme engine speeds.

Technical Specifications