Spec Clutch SC503F Stage 3 Plus Performance Clutch Kit

The Spec Clutch SC503F Stage 3 Plus is the flagship performance clutch kit built for heavily modified street and race engines that demand more torque capacity than the standard Stage 3 can support. Engineered as the best street clutch SPEC produces, the Stage 3+ delivers an outstanding balance of extreme holding power and everyday drivability — making it equally at home on the street, drag strip, road course, or drift track.

Unlike pure race clutches that sacrifice drivability for grip, the Stage 3 Plus uses a full-faced carbon semi-metallic friction disc rather than a puck-style design. This eliminates the harsh on/off engagement feel of race-only clutches while still providing the torque capacity needed for heavily built engines. The result is a clutch that offers better manageability and superior wear characteristics compared to the Stage 3, without compromising performance.

Key Features:

• High-clamp pressure plate for maximum clamping force on high-torque applications
• Full-faced carbon semi-metallic friction disc for excellent bite, long service life, and strong friction coefficient
• Double-sprung hub with spring cover reliefs for drivetrain flexibility and smooth engagement
• Heat-treated hub components for enhanced strength and durability under extreme loads
• High-torque sprung hub and disc assembly engineered for heavily modified powerplants
• Bearing and installation tool kit included for a complete, ready-to-install package
• Designed, hand-built, and tested in the U.S.A.

Intended Use: Street, Drag Racing, Drift, Road Racing, Autocross, Rallye, Pulling

The SC503F Stage 3 Plus clutch kit is the ideal solution for performance enthusiasts running forced induction or other significant engine modifications who need a clutch that can handle serious power while remaining manageable for daily and street driving.