Spec Clutch SJ403 Stage 3 Performance Clutch Kit Carbon Semi-Metallic 6-Puck

The Spec Clutch SJ403 Stage 3 Clutch Kit is engineered for heavily modified street and race engines that demand high torque capacity without sacrificing daily drivability. Delivering a comfortable pedal feel with quick, aggressive engagement, the Stage 3 sits in the sweet spot of Spec's street/strip lineup — capable enough for serious motorsport use while remaining manageable on the street.

At the heart of this kit is a carbon semi-metallic 6-puck sprung hub disc — Spec's proven puck design that leads the industry in drivability, service life, and torque capacity. The double-sprung hub features spring cover reliefs for added flexibility, while heat-treated internal components deliver the strength and durability needed under sustained high-stress conditions. A high-clamp pressure plate ensures consistent clamping force across the full RPM range. Note: a 4-puck configuration can be specified at time of ordering on select applications.

Kit Includes:

• High-clamp performance pressure plate
• Carbon semi-metallic 6-puck sprung hub clutch disc (4-puck available on select applications)
• Release bearing
• Installation tool kit

Recommended Driving Applications:

• Street / Street-Strip
• Drag Racing
• Drifting
• Road Racing
• Rallye
• Pulling
• Autocross

Every Spec clutch kit and flywheel is SFI approved and designed, engineered, and tested in the USA. The Stage 3 is recommended for street/strip use — for full race-only applications, Spec's Stage 4 and Stage 5 kits are available. Input shaft specs: 14-spline, 1.000 in. diameter. Flywheel not included.