Spec Clutch SU085 Stage 5 Clutch Kit - Full-Metallic Racing Clutch

The Spec Clutch SU085 Stage 5 Clutch Kit is SPEC's highest-performance single-disc clutch solution, engineered for extreme motorsport applications including drag racing and pulling competitions. Designed around a full-metallic sintered iron friction disc, this Stage 5 kit delivers the maximum possible torque capacity in a single-disc configuration, making it the go-to choice for heavily modified race engines that demand aggressive, near-instantaneous clutch engagement.

The Stage 5 is also well-suited for applications requiring a slipper clutch or progressive torque-induced engagement behavior. Because each build varies significantly, SPEC strongly recommends consulting with a SPEC technical specialist prior to ordering to ensure the correct configuration for your specific application and power level.

Key Features:

• Full-metallic sintered iron disc — highest possible friction coefficient for maximum torque transfer
• High-clamp pressure plate — extreme clamping force; adjustability available on select applications
• Rigid, unsprung disc assembly — solid 12-rivet hub, heat-treated for strength and durability
• Complete kit — includes pressure plate, full-metallic disc, release bearing, and installation tool kit
• Torque capacity: up to 640 lb-ft (application dependent)
• Compatible with SPEC aluminum flywheel (SU00A) and SPEC steel flywheel (SU00S)

Intended Use:

• Drag racing
• Pulling competitions
• Extreme track/motorsport use

Important: The Stage 5 is not recommended for street driving due to its harsh, aggressive engagement characteristics. This clutch is best ordered as a custom-configured unit — consult a SPEC technical representative with details about your vehicle and its intended purpose before placing an order. SPEC Clutch offers a limited manufacturer warranty covering defects and craftsmanship.