Spec Clutch ST584 Stage 4 Performance Clutch Kit with Carbon Semi-Metallic Disc

The Spec Clutch ST584 Stage 4 Clutch Kit is engineered for heavily modified, high-output engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are the priority. This is a full-competition clutch system designed for drivers who demand the absolute limit of clutch performance on the track. Not recommended for street use due to its aggressive, near-instant engagement characteristics.

Key Features:

• High-clamp pressure plate for dramatically increased clamping force over stock
• Carbon semi-metallic friction disc available in 3-puck, 4-puck, or 6-puck configurations to match specific power and engagement requirements
• Solid 8-rivet rigid hub — a solid hub version of the Stage 3, heat-treated for superior strength and durability under extreme load
• Complete kit includes pressure plate, friction disc, carrier assembly, release bearing, and installation tool kit
• Reduced rotating mass for improved throttle response and quicker rev matching
• Designed, hand-built, and tested in the U.S.A.

Intended Driving Applications:

• Drag Racing
• Drifting
• Road Racing
• Rallye
• Pulling
• Circle Track

The ST584 Stage 4 is the ideal choice for competitors running heavily built engines who need a clutch that can handle extreme torque without slipping. The carbon semi-metallic puck disc delivers the sharp, immediate engagement demanded by motorsport applications, while the high-clamp pressure plate ensures consistent lockup under the most punishing race conditions.