Spec Clutch SP523F Stage 3 Plus Performance Clutch Kit

The SPEC SP523F Stage 3+ Clutch Kit is the flagship high-performance clutch solution engineered for heavily modified street machines and race vehicles that demand torque capacity beyond what the standard Stage 3 can deliver. Designed to provide the ideal balance of aggressive holding power and daily usability, the Stage 3+ steps up friction performance while maintaining manageable, street-friendly engagement feel.

At the heart of this kit is a full-faced carbon semi-metallic friction disc — a material chosen for its exceptional combination of lifespan, friction coefficient, and drivability in a single package. The double-sprung hub features spring cover reliefs for added flexibility, with heat-treated components throughout for long-term strength and durability under extreme loads.

Kit Includes:

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

Intended Driving Applications:

• Street / Daily Driving
• Drag Racing
• Drifting
• Road Racing
• Pulling
• Autocross
• Rally

SPEC Clutch designs and manufactures all products at their purpose-built facility in Bessemer, Alabama, holding components to strict tolerances and developing each clutch stage for specific power and driving environments. The SP523F is assembled to order and engineered to outperform OEM clutches in high-demand, high-torque applications.