Spec Clutch SH403H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SH403H Stage 2 Plus Clutch Kit is the ideal upgrade for modified engines that have outgrown the torque capacity of a standard Stage 2 clutch. Bridging the gap between Stage 2 and Stage 3, this kit delivers a 15–20% higher torque capacity while preserving the smooth engagement feel and daily drivability that Stage 2 is known for.

At the heart of the SH403H 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 dual-material design optimizes both grip and wear life, making it equally capable on the street and the track. A high-clamp pressure plate increases clamping force to handle the additional torque demand of modified powertrains.

The disc assembly uses a double-sprung hub with spring cover relieves for enhanced flexibility, along with heat-treated components for long-term strength and durability. This setup minimizes drivetrain shock and helps protect the transmission under aggressive driving conditions.

Kit Includes:

• High-clamp performance pressure plate
• Composite multi-friction carbon/Kevlar clutch disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Installation tool kit

Intended Use:

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

Designed, hand-built, and tested in the U.S.A., the SPEC SH403H is a proven solution for performance enthusiasts who need more torque capacity without sacrificing the streetable characteristics of a Stage 2 setup.