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The Skunk2 Alpha Series Valves for Honda K20 and K24 engines are engineered for high-performance reliability and efficiency. Manufactured from HNV-3 martensitic steel (intake) and EV8 austenitic steel (exhaust), these one-piece forged valves deliver unmatched strength and resistance to extreme temperatures. Each valve undergoes proprietary heat treatment and hard chrome plating to reduce friction, enhance durability, and resist corrosion—making them ideal for both naturally aspirated and forced induction applications.
Skunk2’s Alpha Series Valves are designed with precision valve head profiles to maximize airflow and sealing performance, resulting in improved horsepower, throttle response, and combustion efficiency. These valves are part of Skunk2’s fully tested and race-proven valvetrain lineup, trusted in every Skunk2-built engine.
Forged One-Piece Construction for ultimate strength and reliability
HNV-3 Martensitic Steel (Intake) / EV8 Austenitic Steel (Exhaust) materials
Hard Chrome Plated Finish reduces friction and resists corrosion
Proprietary Heat Treatment increases strength and longevity
Optimized Valve Head Profile for maximum airflow and sealing
3–10g Lighter Than Stock for improved engine response
Standard Compression Dished Head Design
Compatible with OEM and Aftermarket Valve Springs
Designed and Tested In-House by Skunk2 Racing Engineers
Application: Honda K20 / K24 Engines
Valve Type: Intake / Exhaust
Head Diameter: 35.00mm (Intake) / 30.00mm (Exhaust)
Stem Diameter: 5.48mm (Intake) / 5.45mm (Exhaust)
Overall Length: 109mm (Intake) / 108.6mm (Exhaust)
Material: HNV-3 & EV8 Stainless Steel Alloy
Compression: Standard
Finish: Hard Chrome Plated
Weight: 3–10g lighter than OEM
Compatible with the following Honda engine platforms:
Honda K20 / K20A / K20Z
Honda K24 / K24A / K24Z
For the ultimate valvetrain performance and stability, Skunk2 recommends:
Alpha Series Valve Springs and Ti Retainers – 344-05-1410
Alpha Series Valve Springs – 311-05-1380
Pro XP Valve Springs – 311-05-7380
Pro Ti Retainers – 308-05-0410
Spring Bases for Dual Springs – 312-05-0010
Valve Seals (Required for Spring Base Install) – 312-05-0100
(8) Intake Valves – 35mm
(8) Exhaust Valves – 30mm
