Spec Clutch SM263F Stage 3 Plus High-Performance Clutch Kit

The SPEC SM263F Stage 3 Plus Clutch Kit is the flagship performance clutch solution engineered for heavily modified street and race vehicles that demand more torque capacity than the standard Stage 3 can provide. Designed as the top step in SPEC's single-disc lineup, the Stage 3+ delivers a uniquely balanced combination of high torque handling and street-friendly daily drivability — making it the go-to choice for serious performance builds that still see regular road use.

At the core of the Stage 3+ is a full-faced carbon semi-metallic friction disc, a material chosen for its exceptional service life, high friction coefficient, and smooth engagement characteristics. The disc uses a double-sprung hub with spring cover reliefs for drivetrain flexibility, while heat-treated internal components ensure long-term strength and durability under sustained high-load conditions.

Kit Includes:

• High-clamp performance pressure plate
• Full-faced carbon semi-metallic friction disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Installation tool kit

Ideal Driving Applications:

• Street / Daily Driver (heavily modified)
• Drag Racing
• Drifting
• Road Racing
• Autocross
• Rally
• Pulling

SPEC clutches are designed, tested, and manufactured in-house in the USA, ensuring tight tolerances and consistent performance across every unit. The Stage 3+ offers superior wear characteristics and better overall manageability compared to the Stage 3, making it the preferred upgrade for builds that need maximum torque capacity without sacrificing street usability.