The Skunk2 Alpha Valve Spring & Ti Retainer Kit is a comprehensive valvetrain upgrade for B16, B17, and B18 VTEC engines. This kit combines Skunk2’s dual-rate Alpha valve springs—designed to control valve float above 10,000 rpm—with lightweight, race-proven titanium retainers to reduce valvetrain mass and improve engine response.

Alpha springs are manufactured from super-clean chrome-silicone wire milled in Japan and use matched inner and outer coils with slightly different frequencies to maintain stability under high RPM. The included titanium retainers feature radius-cut edges, lightening grooves, and optimized geometry for a low-profile, strong, and light-weight design. Each retainer is serialized and quality-inspected to ensure accuracy and performance.

Key Features

• Dual-rate Alpha springs built for high-RPM stability

• Lightweight Alpha titanium retainers engineered via CAD/FEA

• Radius-cut edges and lightening grooves for reduced mass

• Serialized, individually inspected retainers

• Seat Pressure: 68 lbs @ 1.320″

• Open Pressure: 210 lbs @ 0.820″

• Coil Bind Height: 0.800″

• Not compatible with Skunk2 Pro Series camshafts

Specifications

Seat Pressure: 68 lbs @ 1.320″
Open Pressure: 210 lbs @ 0.820″
Coil Bind: 0.800″

Fitment

• Honda B16A / B16B

• Honda B17A

• Honda B18C