Spec Clutch SV874-2 Stage 4 Performance Clutch Kit

The Spec Clutch SV874-2 Stage 4 Clutch Kit is a race-engineered performance clutch system built for heavily modified engines that demand maximum torque capacity and instantaneous, positive engagement. Designed as a solid-hub evolution of the Stage 3, this kit is purpose-built for competitive motorsports use including drag racing, road racing, drifting, rallying, pulling, and circle track applications.

At the heart of this kit is a solid 8-rivet hub — a key distinction from the sprung-hub Stage 3 — with the entire assembly heat-treated for superior strength and long-term durability under extreme loads. The carbon semi-metallic friction disc is available in 3, 4, or 6-puck configurations, allowing tuners to dial in the right balance of weight reduction and engagement smoothness. The 3-puck offers the lightest rotating mass, the 6-puck provides the smoothest engagement of the puck options, and the 4-puck delivers a balanced compromise between the two.

Key Features:

• High-clamp performance pressure plate for maximum clamping force
• Carbon semi-metallic friction material in 3, 4, or 6-puck configuration
• Solid 8-rivet rigid hub and carrier assembly — heat-treated for strength and durability
• Rated for up to 517 ft-lbs of torque at the flywheel
• SFI approved construction
• Includes release bearing and installation tool kit

Recommended Applications: Drag Racing, Drift, Road Race, Rallye, Pulling, Circle Track

Important Note: The Stage 4's rigid hub design results in a harsh, instantaneous engagement characteristic. While technically drivable in 6-puck configuration, this clutch is not recommended for street use and is best suited for dedicated race vehicles. This kit requires a compatible SPEC flywheel.