Spec Clutch SM663F Stage 3+ Clutch Kit - Street, Drag, Drift & Road Race

The SPEC SM663F Stage 3 PLUS Clutch Kit is engineered for heavily modified street and race engines that demand torque capacity beyond what the standard Stage 3 can handle. Designed for drivers who need maximum performance without sacrificing daily manageability, the Stage 3+ strikes an ideal balance between aggressive clutch feel and everyday drivability—making it suitable for street driving, drag racing, drifting, road racing, and pulling applications.

Compared to the standard Stage 3, the Stage 3 PLUS delivers even better wear characteristics and improved manageability, making it the go-to choice for builds pushing past Stage 3 torque limits while still requiring street-friendly operation.

Kit Includes:

• High Clamp Pressure Plate – Delivers increased clamping force to handle elevated torque output from heavily modified engines
• Full-Faced Carbon Metallic Friction Disc – Provides superior heat resistance, durability, and consistent torque transfer under high-stress conditions
• High Torque Sprung Hub and Disc Assembly – Absorbs drivetrain shock and reduces wear on transmission components
• Pilot Bearing and Installation Tool Kit – Everything needed for a complete, professional-grade clutch installation

Intended Driving Applications:

• Street / High-Performance Street
• Drag Racing
• Drifting
• Road Racing
• Pulling

The SPEC Stage 3 PLUS clutch system is the ideal upgrade for performance enthusiasts and racers who have exceeded the limits of a Stage 3 setup and need a proven, high-capacity solution backed by SPEC's precision engineering standards.