Spec Clutch SI473 Stage 3 Performance Clutch Kit Carbon Semi-Metallic 6-Puck

The SPEC SI473 Stage 3 Clutch Kit is engineered for heavily modified street and race vehicles that demand aggressive engagement with exceptional torque capacity. Designed to handle the rigors of both daily driving and performance use, the Stage 3 delivers a comfortable pedal feel, quick engagement, and impressive wear characteristics under both low and high stress conditions.

At the heart of this kit is a carbon semi-metallic 6-puck sprung hub disc — a proven design recognized for its best-in-class drivability, service life, and torque handling. The high-clamp pressure plate works in concert with the disc assembly to maximize clamping force, while the double-sprung hub with spring cover reliefs provides flexibility and reduces driveline shock. Heat-treated components throughout ensure long-term strength and durability in demanding applications.

Key Features:

• High-clamp performance pressure plate for maximum torque transfer
• Carbon semi-metallic friction material for superior heat resistance and longevity
• 6-puck sprung hub disc assembly (4-puck configuration available upon request)
• Double-sprung hub with spring cover reliefs for flexibility and shock absorption
• Heat-treated components for enhanced strength and durability
• Includes release bearing and installation tool kit
• SFI approved

Ideal Driving Applications: Street, Drag Racing, Drift, Road Race, Rallye, Pulling, Autocross

The SPEC Stage 3 is the performance enthusiast's choice for a clutch that bridges the gap between street manners and race-ready capability. It is recommended for Stages 1–3+ use on street/strip builds.