Spec Clutch SF483H Stage 2+ Performance Clutch Kit

The Spec Clutch SF483H Stage 2+ Clutch Kit is engineered for modified engines that demand more torque capacity than a standard Stage 2 can deliver, while still retaining the smooth, street-friendly engagement feel the Stage 2 is known for. Bridging the gap between the Stage 2 and Stage 3, this kit offers a 15–20% higher torque capacity with a rated capacity of 635 ft-lbs, making it an ideal choice for high-performance street builds and competitive motorsports applications alike.

The disc uses a composite multi-friction design in a full-faced configuration, with carbon semi-metallic material on one side and Kevlar on the other. This hybrid construction delivers excellent wear characteristics, strong heat resistance, and reliable grip across a wide range of driving conditions. The double-sprung hub features spring cover reliefs for added flexibility, and heat-treated components provide long-term strength and durability.

Key Features:

• High-clamp pressure plate for increased torque holding capacity
• Multi-friction disc — carbon semi-metallic / Kevlar full-faced configuration
• 635 ft-lbs torque rating — 15–20% higher capacity than Stage 2
• Double-sprung hub with spring cover reliefs for smooth engagement and flexibility
• Heat-treated hub components for strength and durability
• Compatible with T-45 and T5 transmissions (10-spline input shaft)
• Includes throw-out/release bearing and clutch alignment tool

Intended Use: Street, Drag, Road Race, Rally, Autocross, Pulling

The SF483H is part of SPEC's USA-manufactured lineup of performance clutch systems, designed and validated for specific driving environments. Stages 1–3+ are recommended for street/strip use.