Spec Clutch ST912 Stage 2 Performance Clutch Kit with Kevlar Disc

The Spec Clutch ST912 Stage 2 Clutch Kit is a high-performance clutch system engineered for drivers who demand more from their drivetrain. Built around a segmented or full-face pure Kevlar disc with steel backing, the Stage 2 delivers the smooth, predictable engagement of the Stage 1 while stepping up torque capacity and friction material longevity — making it an ideal next step for modified or high-demand applications.

The double-sprung hub design features spring cover reliefs for added flexibility under load, while heat-treated components throughout the assembly ensure long-term strength and durability under repeated stress cycles. The high-clamp pressure plate works in concert with the Kevlar friction material to deliver confident, consistent power transfer whether on the street or at the track.

Key Features:

• Pure Kevlar friction material — segmented or full-face disc with steel backing for enhanced durability and torque capacity
• High-clamp pressure plate for firm, reliable power transfer
• Double-sprung hub with spring cover reliefs for drivetrain flexibility and smooth engagement
• Heat-treated components for improved strength and long service life
• High-torque sprung hub and disc assembly optimized for performance driving
• Bearing and alignment tool kit included (where applicable)

Recommended Driving Applications: Street, Drag, Pulling, Autocross

The ST912 is part of Spec Clutch's proven Stage 2 lineup — a versatile street-to-strip solution for enthusiasts seeking a meaningful upgrade over the factory clutch without sacrificing daily driveability.