Spec Clutch SO603 Stage 3 Performance Clutch Kit - Carbon Semi-Metallic 6-Puck

The SPEC Stage 3 Clutch Kit (SO603) is engineered for heavily modified street and race engines that demand aggressive torque capacity without sacrificing daily drivability. Delivering a comfortable pedal feel with quick, confident engagement, the Stage 3 strikes a proven balance between street manners and all-out performance.

Key Features:

• Carbon semi-metallic 6-puck sprung hub disc — the industry-leading puck clutch design for drivability, service life, and torque capacity
• High-clamp pressure plate for maximum torque transfer under high-stress conditions
• Double-sprung hub with spring cover reliefs for flexibility and heat-treated components for strength and long-term durability
• Carbon-graphite friction material for consistent performance under both low and high-stress usage
• High-torque sprung hub and disc assembly designed for aggressive but streetable engagement
• Includes bearing and tool kit for a complete installation solution
• Also available in 3-puck or 4-puck configurations on select applications

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

SPEC Clutch is an American manufacturer producing clutches and flywheels under strict tolerances, with a full lineup spanning Stage 1 through Stage 5 single-disc kits and up to eight stages of multi-disc systems. The Stage 3 sits within SPEC's street/strip range and is recommended for drivers seeking high torque capacity with retained street drivability. Note: Compatible with SPEC Clutch flywheels. Input shaft: 1.031 in. diameter, 23-spline. Flywheel not included.