Spec Clutch SU074 Stage 4 Performance Clutch Kit - Carbon Semi-Metallic

The Spec Clutch SU074 Stage 4 Clutch Kit is a race-focused, solid hub clutch system engineered for heavily modified, high-performance engines demanding maximum torque transfer and instantaneous engagement. Built as a step up from the Stage 3, this kit replaces the sprung hub with a solid 8-rivet hub assembly that is heat-treated for superior strength and durability under extreme conditions.

Available in 3-puck, 4-puck, and 6-puck configurations, the SU074 allows you to tailor engagement characteristics to your specific motorsport application. The 3-puck disc delivers the lightest rotating mass, while the 6-puck offers the smoothest engagement of the three options. The 4-puck configuration provides a balanced compromise between the two. Note: while the 6-puck version is technically street-drivable, the rigid hub design makes all Stage 4 configurations unsuitable for regular street use.

Key Features:

• Solid 8-rivet hub — heat-treated for maximum strength and durability
• High-clamp pressure plate — increased clamping force for high-torque applications
• Carbon semi-metallic friction material — high heat resistance and aggressive torque capacity
• Available in 3, 4, or 6-puck disc configurations — choose based on desired weight and engagement feel
• Bearing and tool kit included — everything needed for a complete installation
• Designed, hand-built, and tested in the USA
• SFI Approved

Intended Use: Drag Racing, Road Racing, Drifting, Rally, Pulling, Circle Track

The Stage 4 is classified as a race-only clutch system. For street and strip applications, SPEC Stages 1 through 3+ are recommended. This kit is ideal for dedicated competition builds where maximum power transfer and lightweight rotating assembly are the top priorities.