Spec Clutch SD105 Stage 5 Clutch Kit - Full-Metallic Drag & Pulling Race Clutch

The SPEC SD105 Stage 5 Clutch Kit is SPEC's most aggressive single-disc clutch offering, engineered for extremely modified drag race and engine pulling applications. This kit delivers the highest possible torque capacity in SPEC's single-disc lineup, making it the go-to choice for purpose-built race vehicles that demand maximum clamping force and minimal slip.

The Stage 5 is also well-suited for applications requiring a slipper or progressive torque-induced engagement characteristic. Due to the aggressive nature of this clutch, it is not street-friendly — harsh engagement is inherent to the design and expected in race use. Buyers are strongly encouraged to consult with a SPEC technical representative to ensure proper configuration for their specific build.

Key Features:

• Full-metallic sintered iron disc with the highest possible friction coefficient in SPEC's single-disc range
• High-clamp pressure plate — adjustability available on select applications
• Rigid iron disc assembly with solid 12-rivet hub, heat-treated for strength and durability
• Includes: pressure plate, disc assembly, release bearing, and installation tool kit
• Designed for progressive torque-induced / slipper clutch engagement behavior
• Best ordered as a custom-configured unit based on application specifics

Intended Use: Drag racing, engine pulling competitions

For optimal results, provide your vehicle details and power output to a SPEC technical assistant prior to ordering to ensure the correct configuration for your application.