Spec Clutch SO704 Stage 4 Performance Clutch Kit

The SPEC SO704 Stage 4 Clutch Kit is a race-grade, solid-hub clutch system engineered for heavily modified, high-performance engines. As a solid hub version of the Stage 3, this kit steps up the performance envelope with an aggressive, instantaneous engagement character suited for competitive motorsport applications.

At the core of the Stage 4 design is a solid 8-rivet hub assembly that is heat-treated for maximum strength and durability under sustained high-torque conditions. A high-clamp pressure plate works in conjunction with carbon semi-metallic friction material to deliver superior clamping force and heat resistance. The kit is available in 3, 4, or 6-puck disc configurations to tailor performance to your specific application — choose the 3-puck for the lightest rotating mass and quickest engagement, the 6-puck for the smoothest engagement characteristics, or the 4-puck as a balanced compromise between the two.

Key Features:

• Solid 8-rivet hub assembly — heat-treated for strength and durability
• High-clamp performance pressure plate
• Carbon semi-metallic friction material for superior heat resistance and grip
• Available in 3-puck, 4-puck, and 6-puck configurations
• High-torque solid hub and disc assembly
• Includes bearing and tool kit
• SFI Approved

Intended Use: Drag Racing, Drift, Road Racing, Rallye, Pulling, Circle Track

Note: The Stage 4 is a race-only clutch kit. Due to the rigid solid hub design, this kit is not recommended for street driving. Stages 1–3+ are recommended for street/strip use. Compatible with SPEC Clutch flywheels.