Spec Clutch SHZ154 Stage 4 High-Performance Clutch Kit

The Spec Clutch SHZ154 Stage 4 Clutch Kit is a race-grade, solid hub upgrade engineered for drivers who demand maximum holding power and durability. Building on the Stage 3 platform, the Stage 4 replaces the sprung hub with a solid 8-rivet hub assembly that is heat-treated for exceptional strength under extreme stress. This kit is designed for competitive motorsport applications including drag racing, road racing, rally, pulling, and drift.

The SHZ154 is available in 3, 4, or 6-puck configurations to suit a range of performance needs. The 3-puck disc offers the lightest rotating mass, while the 6-puck provides the smoothest engagement and remains street-drivable — though the rigid solid hub makes this kit best suited for dedicated performance use rather than daily driving. The 4-puck configuration strikes a balance between the two extremes.

Kit Features:

• Solid 8-rivet hub — heat-treated for high-torque strength and durability
• High clamp pressure plate — maximizes grip and power transfer
• Carbon-graphite friction material — superior heat resistance and long service life
• Available in 3, 4, or 6-puck disc configurations — select based on application
• Includes bearing and installation tool kit
• Designed, hand-built, and tested in the USA

Ideal Driving Applications: Drag Racing, Road Racing, Rally, Pulling, Drift, Autocross

All Spec Clutch kits are manufactured under strict tolerances and are SFI approved, making the SHZ154 a trusted choice for serious performance builds.