Spec Clutch SD503F Stage 3 Plus Performance Clutch Kit

The SPEC SD503F Stage 3 Plus Clutch Kit is the flagship performance clutch solution for heavily modified street and race vehicles that demand more torque capacity than the standard Stage 3 can provide. Engineered for high-powered builds, the Stage 3+ delivers the aggressive grip of a race clutch while maintaining the daily drivability and manageable engagement characteristics that make it practical for street use.

At the heart of the Stage 3+ is a full-faced carbon semi-metallic friction disc, which offers superior friction coefficient, extended service life, and consistent engagement feel compared to puck-style race clutches. The disc's full-face design eliminates the harsh on/off engagement associated with pure race clutches, making it far more forgiving during daily driving and stop-and-go conditions.

Key Features:

• High-clamp pressure plate for increased clamping force on high-torque applications
• Full-faced carbon semi-metallic friction material for superior bite and long service life
• Double-sprung hub with spring cover reliefs for smooth, flexible engagement
• Heat-treated hub components for enhanced strength and durability
• High-torque sprung hub and disc assembly
• Release bearing and installation tool kit included
• Manufactured in the U.S.A.

Ideal Driving Applications: Street, Drag Racing, Drifting, Road Racing, Autocross, Pulling, Rally

The SPEC Stage 3 Plus is the ideal choice for forced-induction, built, or otherwise heavily modified engines that have outgrown the standard Stage 3 clutch. It bridges the gap between all-out race performance and real-world street usability, making it one of the most versatile high-performance clutch options available.