Spec Clutch SZ403H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SZ403H 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 familiar, street-friendly engagement feel of the Stage 2 while offering a 15–20% higher torque capacity — making it an ideal upgrade for spirited street driving and competitive motorsport alike.

Key Features:

• Composite multi-friction disc in a full-face configuration — carbon semi-metallic material on one side and Kevlar® on the other for excellent wear characteristics and heat resistance
• High-clamp pressure plate for increased clamping force on modified, higher-output engines
• Double-sprung hub with spring cover reliefs for pedal flexibility and smooth power transfer
• Heat-treated hub components for long-term strength and durability under hard use
• Bearing and tool kit included for a complete installation

Recommended Applications: Street, Drag Racing, Road Racing, Rally, Autocross, Pulling, and Drift

Designed, hand-built, and tested in the U.S.A., the SPEC SZ403H Stage 2 Plus kit is the go-to choice for enthusiasts who need more than a Stage 2 can handle without stepping up to the aggressive engagement characteristics of a Stage 3.