Spec Clutch SZ373H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SZ373H Stage 2 Plus Clutch Kit bridges the gap between the Stage 2 and Stage 3 clutch lineups, delivering the smooth, street-friendly engagement feel of the Stage 2 while offering a 15–20% higher torque capacity. It is purpose-built for modified engines that have exceeded the torque threshold of a standard Stage 2 clutch but don't require the aggressive characteristics of a full Stage 3.

At the heart of this kit is a composite multi-friction disc in a full-faced configuration, featuring carbon semi-metallic material on one side and Kevlar on the other. This hybrid friction pairing delivers excellent wear characteristics alongside strong heat resistance and grip under demanding conditions. The high-clamp pressure plate increases clamping force beyond OEM levels, while the double-sprung hub with spring cover reliefs provides flexibility to absorb drivetrain shock, and heat-treated internal components ensure long-term strength and durability.

Kit Includes:

• High-clamp performance pressure plate
• Multi-friction carbon semi-metallic / Kevlar clutch disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Alignment tool kit

Recommended Applications:

• Street performance
• Drag racing
• Road racing
• Rally and rallycross
• Autocross
• Pulling
• Drift

Spec Clutch engineers and manufactures all products in-house at their purpose-built facility in Bessemer, Alabama, holding components to strict tolerances for consistent performance. The Stage 2 Plus is an ideal upgrade for enthusiasts running power modifications who need reliable torque capacity without sacrificing daily drivability.