SPEC SB633F Stage 3 Plus Clutch Kit - Carbon Semi-Metallic Full Face

The SPEC Stage 3+ Clutch Kit (SB633F) is the flagship performance clutch solution for heavily modified street and race vehicles that have exceeded the torque handling threshold of the standard Stage 3. Engineered to deliver serious power management while retaining surprisingly friendly daily drivability, the Stage 3+ strikes the ideal balance between aggressive performance and street manageability.

At the core of the Stage 3+ is a full-faced carbon semi-metallic friction disc, a material chosen for its exceptional combination of service life, friction coefficient consistency, and engagement feel. Unlike puck-style discs, the full-face design distributes clamping load evenly across the entire disc surface, reducing heat spikes and extending component longevity under sustained high-torque conditions.

The disc hub is double-sprung with spring cover reliefs to absorb driveline shock and provide engagement flexibility, while all hub components are heat-treated for maximum strength and durability under repeated high-load cycling.

Kit Includes:

• High-clamp performance pressure plate
• Full-faced carbon semi-metallic friction disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Installation tool kit

Ideal Driving Applications:

• Street / Daily Driven High-Performance
• Drag Racing
• Road Racing
• Drifting
• Autocross
• Rally
• Pulling

The SPEC Stage 3+ offers superior wear characteristics and better torque capacity than the Stage 3 while maintaining the manageable pedal feel and engagement quality that SPEC clutches are known for — making it the top-tier choice for serious builds that still see street miles.