Spec Clutch SZ333H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SZ333H Stage 2 Plus Clutch Kit is engineered for modified engines that demand more torque capacity than a standard Stage 2 clutch can deliver. Bridging the gap between the Stage 2 and Stage 3, this kit delivers the smooth, street-friendly drivability and engagement feel of the Stage 2 while offering a 15–20% higher torque capacity — making it an ideal upgrade for high-performance builds that still see regular street use.

The disc features a full-faced composite multi-friction design, with carbon semi-metallic material on one side and Kevlar® on the other, providing excellent wear life and consistent friction performance across a wide range of operating conditions. The double-sprung hub with spring cover reliefs absorbs driveline shock for smooth engagement, while heat-treated internal components ensure long-term strength and durability under demanding loads.

Key Features:

• Full-faced composite multi-friction disc — carbon semi-metallic on one side, Kevlar® on the other
• High-clamp pressure plate for increased torque holding capacity
• Double-sprung hub with spring cover reliefs for engagement smoothness and flexibility
• Heat-treated components for enhanced strength and durability
• High-torque sprung hub and disc assembly
• Bearing and installation tool kit included
• Designed and hand-built in the U.S.A.

Ideal Driving Applications: Street, Drag Racing, Road Racing, Rally, Autocross, Pulling, and Drifting

The SZ333H is sold as a complete kit and is part of SPEC's extensive lineup of vehicle-specific performance clutch solutions, designed for drivers who require more than a stock replacement but still value daily driveability.