Spec Clutch SI474 Stage 4 Performance Clutch Kit

The Spec Clutch SI474 Stage 4 Clutch Kit is a race-grade clutch system engineered for heavily modified, high-output engines where maximum torque transfer and rapid engagement are the priority. This is a purpose-built competition clutch — not intended for street-friendly daily driving — delivering the uncompromising performance demanded in drag racing, road racing, drifting, and rallye competition.

Key Features:

• Solid Hub Design: The Stage 4 is a solid hub version of the Stage 3, featuring an 8-rivet solid hub that eliminates the sprung center for instantaneous, direct engagement
• Heat-Treated Assembly: The hub and carrier assembly are heat-treated for exceptional strength and durability under extreme operating conditions
• Carbon Semi-Metallic Friction Disc: Available in 3, 4, or 6-puck configurations to suit your specific power level and driving style
• High Clamp Pressure Plate: Delivers the clamping force needed to handle high-torque, heavily modified engine outputs without slippage
• Complete Kit: Includes high clamp pressure plate, carbon semi-metallic puck disc with rigid hub and carrier assembly, release bearing, and alignment tool
• SFI Approved: All Spec clutch kits and flywheels carry SFI approval for sanctioned competition use
• Designed and Built in the USA: Every Spec clutch is hand-built and tested domestically to strict quality standards

Recommended Applications: Drag Racing, Drifting, Road Racing, Rallye, Pulling, Circle Track

Important Note: Due to its solid hub design and aggressive engagement characteristics, the Stage 4 is not recommended for street use. This clutch is intended for competition and track environments where performance takes precedence over everyday drivability.