Spec Clutch SH143H Stage 2 Plus Performance Clutch Kit

The SPEC SH143H Stage 2 Plus Clutch Kit is engineered for modified engines that demand more torque capacity than a standard Stage 2 clutch can provide. Bridging the gap between Stage 2 and Stage 3, this kit delivers a 15–20% higher torque capacity while maintaining the smooth engagement feel and daily drivability that Stage 2 is known for.

At the heart of the Stage 2 Plus is a composite multi-friction disc in a full-faced configuration, combining carbon semi-metallic material on one side with Kevlar on the other. This hybrid friction pairing balances aggressive grip with excellent wear characteristics. The hub is double-sprung with spring cover reliefs for flexibility and heat-treated components for lasting strength and durability under high-stress conditions.

Key Features:

• High-clamp pressure plate for increased clamping force
• Hybrid carbon semi-metallic and Kevlar multi-friction disc in full-faced configuration
• High-torque sprung hub and disc assembly — double-sprung with heat-treated components
• 15–20% higher torque capacity compared to Stage 2
• Maintains Stage 2 street engagement feel for daily drivability
• Excellent wear characteristics for long service life
• Includes bearing and installation tool kit

Suitable Driving Applications: Street, Drag, Road Race, Rally, Autocross, Pulling, Drift

SPEC Clutch designs and hand-builds all of its performance clutch products in the USA, engineered to precise tolerances for consistent, reliable performance across a wide range of motorsport and street applications.