Spec Clutch SH094 Stage 4 Carbon-Graphite Performance Clutch Kit

The SPEC SH094 Stage 4 Clutch Kit is a race-grade, solid hub clutch system engineered for heavily modified engines where instantaneous engagement and reduced rotating mass are critical. Built as a solid hub evolution of the Stage 3, this kit is purpose-designed for serious motorsport applications including drag racing, road racing, rally, drifting, pulling, and circle track competition. Due to its rigid hub design and aggressive engagement characteristics, it is not recommended for street use.

Key Features:

• High-clamp pressure plate for maximum clamping force and torque transfer
• Carbon-graphite friction material in 3, 4, or 6-puck disc configurations
• Solid 8-rivet rigid hub — heat-treated for strength and durability
• 7.875 in. disc diameter with 21-spline input shaft (0.844 in. diameter)
• Includes bearing and tool kit for installation
• Available in 3-puck (lightest weight), 4-puck (balanced compromise), or 6-puck (smoothest engagement among Stage 4 options)
• All SPEC clutch kits are SFI approved

Intended Use: Drag Racing, Drift, Road Race, Rally, Pulling, Circle Track

The Stage 4 is SPEC's entry into full race-only clutch territory. The solid, non-sprung hub delivers the instantaneous lock-up demanded by competition environments where engagement feel is less important than maximum holding power and drivetrain responsiveness. The 6-puck configuration offers the most manageable engagement within the Stage 4 lineup, while the 3-puck delivers the lowest rotational mass for applications where every ounce counts.