Spec Clutch SO603H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SO603H Stage 2 Plus Clutch Kit is engineered for modified engines that have outgrown the torque capacity of a standard Stage 2 clutch. Bridging the gap between Stage 2 and Stage 3, the Stage 2+ delivers the familiar, street-friendly engagement feel of the Stage 2 while providing a 15–20% higher torque capacity — making it ideal for enthusiasts who have added power modifications but still want excellent daily drivability.

The kit features a multi-friction, full-faced disc with carbon semi-metallic material on one side and Kevlar on the other, delivering outstanding wear characteristics and consistent performance across a wide range of driving conditions. The double-sprung hub incorporates spring cover reliefs for added flexibility, while heat-treated internal components ensure long-term strength and durability.

Kit Includes:

• High-clamp performance pressure plate
• Multi-friction composite disc — carbon semi-metallic / Kevlar full-face configuration
• High-torque double-sprung hub and disc assembly
• Release bearing and installation tool kit

Recommended Driving Applications:

• Street
• Drag Racing
• Road Racing
• Rally
• Autocross
• Pulling

All Spec Clutch products are designed, hand-built, and tested in the U.S.A. to exacting standards, ensuring the perfect balance of clamp load, friction material, and rotating mass for a clutch that performs as hard as you drive.