Skunk2 Alpha Series Valves are engineered for performance and reliability in Honda B-Series VTEC engines, specifically the B16, B17, and B18C. Manufactured from premium one-piece HNV-3 martensitic steel for intake and EV8 austenitic steel for exhaust, these valves undergo proprietary heat treatment and hard chrome plating for superior strength, reduced friction, and increased corrosion resistance.

Designed in-house by Skunk2 using advanced flow analysis and real-world testing, Alpha Series valves feature optimized head profiles that enhance airflow and combustion efficiency while offering 3–10g weight reduction over stock valves. Whether for street or competition use, they deliver exceptional sealing, stability, and durability under high RPM conditions.

Key Features:

• One-piece forged design for strength and reliability

• HNV-3 steel intake / EV8 steel exhaust construction

• Proprietary heat-treated and hard chrome plated for reduced wear

• Optimized head profiles for improved airflow and combustion

• Dished head, standard compression configuration

• 3–10 grams lighter than stock for reduced valvetrain mass

• Designed and tested in-house by Skunk2 engineers

Specifications:

• Overall Length (IN/EX): 102mm / 102mm

• Head Diameter (IN/EX): 33.00mm / 28.00mm

• Stem Diameter (IN/EX): 5.48mm / 5.45mm

• Weight (IN/EX): 43–44g / 37–38g

• Design: Standard Intake / Standard Exhaust – Dished Head – Standard Compression

Recommended Upgrades:

• Alpha Series Valve Springs & Titanium Retainers (P/N 344-05-1300)

• Alpha Series Valve Springs (P/N 311-05-1350)

• Pro XP Valve Springs (P/N 311-05-7350)

• Pro Titanium Retainers (P/N 308-05-0300)

Vehicle Fitment:

• Honda B16A/B

• Honda B17A

• Honda B18C

Included:

• (1) Complete Set of Intake and Exhaust Valves (16 valves total)