Spec Clutch SA605 Stage 5 Full-Metallic Clutch Kit

The SPEC SA605 Stage 5 Clutch Kit is SPEC's highest-grade single-disc clutch system, engineered for extreme performance applications including drag racing, tractor pulling, and high-output modified engines. Built around a full-metallic sintered iron disc, this kit delivers the highest possible friction coefficient available in SPEC's clutch lineup, providing aggressive, positive engagement under severe torque loads.

The disc assembly features a solid 12-rivet unsprung hub that is heat-treated for maximum strength and long-term durability. A high-clamp pressure plate ensures consistent clamping force even under extreme heat and load conditions. All SPEC clutch kits and flywheels are SFI approved, meeting the rigorous standards required for sanctioned motorsport competition.

Kit Contents:

• High-clamp pressure plate
• Full-metallic sintered iron friction disc (full face, unsprung hub)
• Release bearing
• Installation tool kit

Key Features:

• Full-metallic disc with maximum friction coefficient for extreme torque capacity
• Solid 12-rivet heat-treated hub and disc assembly
• High-clamp pressure plate for superior clamping force
• SFI approved for sanctioned racing
• Compatible with OE dual mass flywheels or billet single mass flywheel (application-dependent)
• 23-spline input shaft, 0.938 in. input shaft diameter

Intended Use: Drag Racing, Tractor Pulling, Autocross, Extreme Performance. Note: This clutch is street-drivable but not street-friendly due to harsh, aggressive engagement characteristics. Stages 4 and 5 are recommended for race-focused applications.