Spec Clutch SN503-2 Stage 3 Performance Clutch Kit with Carbon-Graphite 6-Puck Disc

The Spec Clutch SN503-2 Stage 3 Clutch Kit is a high-performance clutch system engineered for drivers who demand aggressive engagement without sacrificing street manners. Featuring a carbon semi-metallic 6-puck sprung hub disc, this kit delivers an industry-leading combination of drivability, service life, and torque capacity — making it the go-to choice for heavily modified street and track builds alike.

The sprung hub design uses a double-sprung configuration with spring cover reliefs that provide flexibility under load, while heat-treated internal components ensure long-term strength and durability. Paired with a high-clamp pressure plate and carbon-graphite friction material, the SN503-2 provides quick, confident engagement that holds up under demanding conditions. A bearing and tool kit are included to streamline installation.

Key Features:

• Carbon semi-metallic 6-puck sprung hub disc — proven leader in drivability, lifespan, and torque capacity
• High-clamp pressure plate for maximum holding power
• Carbon-graphite friction material for consistent, heat-resistant engagement
• Double-sprung hub with spring cover reliefs for flexibility and vibration damping
• Heat-treated hub components for enhanced strength and durability
• Bearing and tool kit included for easier installation
• Also available in 3-puck configuration
• 21-spline input shaft, 0.938 in. input shaft diameter

Recommended Driving Applications:

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

SPEC Clutch is an American manufacturer designing and hand-building all of its performance clutch systems domestically. The Stage 3 sits within SPEC's street/strip lineup (Stages 1–3+) and is the ideal step up for vehicles needing aggressive but streetable engagement beyond what a Stage 1 or 2 can offer.