Spec Clutch SF821 Stage 1 Clutch Kit - Organic High-Clamp Performance

The Spec Clutch SF821 Stage 1 Clutch Kit is an ideal performance upgrade for bolt-on naturally aspirated and mildly modified forced induction engines. Engineered to deliver stock-like daily drivability with significantly improved durability, the Stage 1 is SPEC's entry-level performance clutch designed for drivers who want a noticeable step up in clutch quality without sacrificing street manners.

At the heart of the SF821 is an integrally molded carbon Kevlar-based, high-performance organic friction lining that provides smooth, predictable engagement and exceptional service life. The lining features an integrally bonded steel backing for added strength under high clamp loads and elevated temperatures. The hub is double-sprung with spring cover reliefs for enhanced flexibility, and all hub components are heat-treated for long-term strength and durability.

Kit Includes:

• High-clamp performance pressure plate
• Steel-backed, multi-compound woven organic clutch disc
• High-torque sprung hub and disc assembly
• Release bearing
• Installation tool kit

Suitable Driving Applications:

• Street
• Drag Racing
• Drifting
• Road Racing
• Rallye
• Pulling
• Autocross

All SPEC clutches are designed, hand-built, and tested in the USA. SPEC engineers each clutch to deliver the optimal balance of clamp load, friction material, diameter, and rotating mass — making the SF821 an outstanding choice for enthusiasts who demand reliable performance both on the street and at the track.