Built for serious drag racers and land-speed competitors, Brock’s Extra Heavy Duty Green Springs are designed to deliver maximum clamping force and durability in demanding clutch applications. These springs are a direct replacement for the Hayabusa Clutch Cushion Kit (99–20), providing increased pressure for higher MPH, quicker acceleration, and reduced clutch wear.
Manufactured from valve-spring quality steel, each spring is shot-peened and stress-relieved to withstand extreme heat and abuse, and engineered for millions of trouble-free cycles. Perfect for Real Street, Grudge, and other high-horsepower hand-clutch setups, these springs offer the serious lever pressure required to keep power locked in.
FEATURES
- Includes (6) extra heavy duty green springs (.120″ dia. wire)
- Direct replacement in Hayabusa Clutch Cushion Kit (1999–2020)
- Compatible with Brock’s adjustable spring tops
- Reference: 120 lb. static pressure at 1.00″ installed height
- Proven in Real Street, Grudge, and high-power hand-clutch racing
- Provides quicker acceleration, longer clutch life, and higher MPH
- Made from valve-spring quality material, shot-peened and stress-relieved
- Engineered for millions of trouble-free cycles
FITMENT – IMPORTANT INFORMATION BEFORE ORDERING
- Do NOT use with Ultra Mod spacers in early Hayabusa applications.
- These springs replace stock springs and Ultra Mod spacers in the Hayabusa Clutch Cushion Kit.
- Not compatible with stock Hayabusa Clutch Mod or Ultra Mod without the Clutch Cushion Kit installed.
- Expect severe lever pressure, suitable only for serious performance builds.
- A Clutch Slave Cylinder Support is required on 1999–2007 Hayabusa applications.
- Installer is responsible for ensuring proper assembly without coil-bind
