Spec Clutch SU034 Stage 4 Performance Clutch Kit - Carbon Composite 3/4/6-Puck

The SPEC SU034 Stage 4 Clutch Kit is a high-performance, competition-grade clutch designed for heavily modified engines where maximum torque transfer, instantaneous engagement, and reduced rotating mass are critical. The Stage 4 is a solid hub version of the Stage 3 clutch, purpose-built for drivers who demand the most aggressive clutch performance available in a single-disc setup.

Each hub is solid with eight rivets, and the assembly is heat-treated for strength and durability. The kit is available in 3, 4, and 6-puck configurations to suit different performance priorities. Use the 3-puck for the lightest rotating weight option or the 6-puck for the smoothest engagement — the 4-puck offers a solid compromise between the two.

Key Features:

• High-clamp pressure plate for maximum clamping force and torque capacity
• Carbon semi-metallic friction material in 3, 4, or 6-puck configuration for aggressive engagement
• Solid 8-rivet hub — heat-treated for high-torque durability
• 21-spline input shaft with 0.875 in. diameter
• Bearing and tool kit included
• Single disc design

Intended Use:

• Drag Racing
• Drift
• Road Racing
• Rallye
• Pulling
• Circle Track

This clutch is street-drivable in 6-puck configuration, but is not street-friendly due to the rigid hub and harsh engagement characteristics. It is best suited for dedicated competition or track use.