Spec Clutch SO133 Stage 3 Performance Clutch Kit - Carbon Semi-Metallic 6-Puck

The SPEC SO133 Stage 3 Clutch Kit is engineered for heavily modified street and race engines that demand aggressive engagement without sacrificing daily drivability. Designed to balance high torque capacity with a comfortable pedal feel, the Stage 3 is a proven choice for drivers who push their vehicles hard on the street and at the track.

Key Features:

• Carbon semi-metallic 6-puck sprung hub disc — the industry-leading puck clutch design for drivability, longevity, and torque capacity
• High-clamp pressure plate for consistent, confident engagement under demanding conditions
• Double-sprung hub with spring cover reliefs for flex and heat-treated components for strength and durability
• High-torque sprung hub and disc assembly handles elevated power levels with reliability
• Bearing and tool kit included for straightforward installation
• Also available in 4-puck or 3-puck configurations — 6-puck is standard on most applications; alternate puck counts can be specified at time of ordering
• Disc diameter: 9.500 in. (241 mm)
• Input shaft diameter: 0.850 in. | Input spline count: 20
• Flywheel not included

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

All SPEC clutch kits are designed, hand-built, and tested in the USA. The Stage 3 sits in SPEC's performance lineup above Stage 2+ and below Stage 3+, making it the ideal step-up for modified engines that require serious holding power while retaining streetable manners.