Spec Clutch SC403F-2 Stage 3 Plus Performance Clutch Kit

The Spec Clutch SC403F-2 Stage 3 Plus Clutch Kit is SPEC's flagship single-disc performance clutch, engineered for high-powered street and race vehicles that demand strong torque capacity without sacrificing daily drivability. Built around a carbon semi-metallic full-face friction disc, the Stage 3+ delivers an exceptional balance of long service life, high friction coefficient, and smooth, manageable engagement in a single complete package.

The disc hub features a double-sprung design with spring cover reliefs, providing added flexibility under load, while heat-treated internal components ensure long-term strength and durability under demanding conditions. A high-clamp pressure plate rounds out the assembly, maximizing clamping force for reliable power transfer at elevated torque levels.

Key Features:

• Carbon semi-metallic full-face friction material — outstanding life, friction coefficient, and drivability
• High-clamp pressure plate for maximum torque holding capacity
• Double-sprung hub with spring cover reliefs for flexibility and heat-treated components for durability
• High-torque sprung hub and disc assembly
• Bearing and tool kit included
• Sold as a complete kit — everything needed for installation

Ideal Applications:

• Street performance
• Drag racing
• Autocross
• Road racing
• Rally
• Pulling
• Drifting

SPEC clutches are manufactured in the United States to strict tolerances, making the Stage 3 Plus an ideal upgrade for drivers who need race-ready performance with street-friendly engagement characteristics.