Spec Clutch SB114 Stage 4 Performance Clutch Kit

The Spec Clutch SB114 Stage 4 Clutch Kit is a race-grade clutch system engineered for heavily modified, high-output engines demanding maximum holding capacity and instantaneous engagement. Built as the solid hub evolution of the Stage 3, this kit delivers the aggressive performance characteristics required for competitive motorsport applications.

Key Features:

• Solid 8-Rivet Hub: Rigid hub construction eliminates the compliance of a sprung hub, providing direct, instantaneous power transfer to the drivetrain
• Heat-Treated Assembly: Hub and carrier assembly are heat treated for superior strength and long-term durability under high-stress racing conditions
• Carbon Semi-Metallic Friction Material: High-friction carbon semi-metallic puck disc delivers exceptional torque capacity and consistent bite under extreme heat
• Multiple Puck Configurations: Available in 3, 4, or 6-puck setups — choose 3-puck for the lightest rotating mass, 6-puck for the smoothest engagement, or 4-puck as an ideal balance of both
• High Clamp Pressure Plate: Aggressive clamping force ensures the disc holds under high torque loads without slippage
• SFI Approved: Every Spec Clutch kit and flywheel carries SFI approval for sanctioned racing use

What's Included:

• High clamp pressure plate
• Carbon semi-metallic puck disc (3, 4, or 6 puck)
• Release bearing
• Alignment tool

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

Important Note: The Stage 4 is not recommended for street use due to the rigid hub design and harsh engagement characteristics. The 6-puck configuration may be driven on the street but is not street-friendly. This kit is best suited for dedicated race vehicles or track-day builds where uncompromising performance outweighs daily drivability. If using an existing flywheel, the flywheel must be resurfaced prior to installation.