Spec Clutch SF523H-3 Stage 2 Plus Performance Clutch Kit

The SPEC SF523H-3 Stage 2 Plus Clutch Kit is a high-performance upgrade designed for drivers who demand more holding power without sacrificing everyday drivability. Engineered to bridge the gap between the Stage 2 and Stage 3 clutch kits, the Stage 2+ delivers the smooth engagement and street-friendly feel of the Stage 2 while providing a 15–20% increase in torque capacity.

At the heart of this kit is a multi-friction disc in a full-faced configuration, combining carbon semi-metallic friction material on one side with Kevlar® on the other. This hybrid friction pairing optimizes heat resistance, wear life, and engagement quality across a wide range of driving conditions. The hub assembly is double-sprung with spring cover reliefs for enhanced flex and features heat-treated components throughout for long-term strength and durability. Every SPEC clutch kit and flywheel carries SFI certification.

Key Features:

• Hybrid friction disc — carbon semi-metallic on one side, Kevlar® on the other, full-faced configuration
• 15–20% higher torque capacity than the SPEC Stage 2 clutch
• High-clamp performance pressure plate for improved clamping force
• Double-sprung hub with spring cover reliefs for flexibility and vibration dampening
• Heat-treated hub components for strength and long service life
• Includes bearing and tool kit for straightforward installation
• SFI Approved clutch kit and components

Ideal Driving Applications:

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

Installation Note: Unless using a new SPEC flywheel, the existing flywheel surface must be resurfaced prior to installation to ensure proper friction surface integrity.