Spec Clutch SC683H-3 Stage 2 Plus Performance Clutch Kit

The Spec Clutch SC683H-3 Stage 2 Plus Clutch Kit is engineered to bridge the gap between the Stage 2 and Stage 3 performance levels. It delivers the smooth, street-friendly drivability and engagement quality of the Stage 2, while providing a 15–20% higher torque capacity — making it an ideal upgrade for drivers who demand more holding power without sacrificing daily driveability.

At the core of this kit is a multi-friction disc in a full-faced configuration, combining carbon semi-metallic material on one side with Kevlar on the other. This hybrid friction pairing optimizes grip, heat resistance, and wear life across a wide range of driving conditions. The hub is double-sprung with spring cover reliefs for added flexibility, and all components are heat-treated for long-term strength and durability.

Key Features:

• High-clamp pressure plate for increased torque holding capacity
• Hybrid carbon semi-metallic and Kevlar full-faced friction disc
• Double-sprung hub with spring cover reliefs for smooth, flexible engagement
• Heat-treated components for enhanced strength and durability
• Includes bearing and installation tool kit

Recommended Applications:

• Street
• Drag Racing
• Autocross
• Road Racing
• Pulling
• Rallye
• Drift

The SC683H-3 is designed for use with the factory flywheel or an aftermarket flywheel modeled after the factory unit with a recessed friction surface. All SPEC clutch kits and flywheels are SFI approved and manufactured under strict tolerances for consistent, race-proven performance.