Spec Clutch SC544 Stage 4 Performance Clutch Kit - Race Grade Carbon Semi-Metallic

The Spec Clutch SC544 Stage 4 Clutch Kit is a race-grade clutch system engineered for heavily modified, high-output engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are the top priorities. This is a purpose-built competition clutch — not intended for street use — and is best suited for dedicated drag, drift, road race, rallye, pulling, and circle track applications.

The Stage 4 is a solid hub evolution of the Stage 3 design. The high-torque rigid hub uses a solid 8-rivet construction and is heat-treated for enhanced strength and durability under extreme load. It pairs with a high clamp pressure plate to deliver firm, consistent clamping force and is available in 3, 4, or 6-puck carbon semi-metallic friction disc configurations to match your specific performance needs.

Puck Configuration Guide:

• 3-Puck: Lightest option — ideal for maximum RPM response and weight savings
• 4-Puck: Balanced compromise between weight and engagement smoothness
• 6-Puck: Smoothest engagement of the three; marginally street-drivable but still not street-friendly due to the rigid hub

Key Features:

• High clamp performance pressure plate for firm, reliable clamping force
• Carbon semi-metallic friction material for aggressive, consistent engagement
• Solid 8-rivet heat-treated hub and disc assembly for high-torque applications
• SFI approved — every Spec Clutch kit and flywheel meets SFI certification standards
• Includes bearing and tool kit for a complete installation package

Intended Driving Environments: Drag Racing, Drift, Road Racing, Rallye, Pulling, Circle Track

Note: Due to the rigid hub design, this clutch is not recommended for street driving. For street/strip use, Spec Stages 1–3+ are recommended. Stage 4 is a race-only application.