Spec Clutch ST623F Stage 3 Plus Clutch Kit

The SPEC ST623F Stage 3 Plus Clutch Kit is the flagship performance clutch solution for heavily modified street and race engines that exceed the torque limits of the standard Stage 3. Engineered to deliver confident, manageable engagement even under extreme power loads, the Stage 3+ strikes the ideal balance between high-performance capability and everyday drivability — outperforming the Stage 3 in both manageability and wear longevity.

At the core of the Stage 3+ is a full-faced carbon metallic friction disc paired with a high-clamp pressure plate, offering outstanding friction coefficient, heat resistance, and service life in a single package. The disc features a double-sprung hub with spring cover reliefs for pedal flexibility, and heat-treated components throughout for added strength and durability.

Kit Includes:

• High-clamp pressure plate
• Full-faced carbon metallic clutch disc
• High-torque double-sprung hub and disc assembly
• Installation tool kit

Intended Applications:

• Street (including heavy daily use on modified vehicles)
• Drag Racing
• Drifting
• Road Racing
• Rallye
• Pulling
• Autocross

The SPEC Stage 3+ is purpose-built for high-powered street and competition vehicles that demand reliable, repeatable clutch performance without sacrificing pedal feel or drivability.