Spec Clutch SZ485 Stage 5 Clutch Kit - Full-Metallic Sintered Iron Disc

The Spec Clutch SZ485 Stage 5 Clutch Kit is a full-race clutch system engineered for the most demanding high-performance and competition applications. Featuring a full-metallic sintered iron disc with the highest available friction coefficient, the Stage 5 delivers maximum torque capacity and aggressive engagement characteristics purpose-built for drag racing and pulling events.

The Stage 5 is the top of Spec's single-disc lineup, rated at 577 ft-lbs of torque capacity (measured at the flywheel). The disc assembly uses a solid 12-rivet hub that is heat-treated for exceptional strength and durability under extreme loads. The high-clamp pressure plate provides the clamping force required for race-level power output, while the unsprung hub design delivers direct, immediate power transfer.

Key Features:

• Full-metallic sintered iron disc with maximum friction coefficient
• High-clamp pressure plate for race-level clamping force
• Solid 12-rivet heat-treated hub and disc assembly
• Unsprung (rigid) hub for direct torque transfer
• 577 ft-lbs torque capacity (at flywheel)
• SFI approved construction
• Includes bearing and installation tool kit

Intended Use: Drag Racing, Pulling

Important Note: The Stage 5 is a race-only clutch. Due to its harsh, aggressive engagement characteristics, it is not recommended for street use. This kit may be available as a custom-configured unit — consult a Spec technical representative to ensure the correct specification for your application prior to ordering.