Spec Clutch SU014F Stage 3+ High-Performance Clutch Kit

The SPEC SU014F Stage 3+ Clutch Kit is the flagship single-disc performance clutch for heavily modified street and race engines that demand high torque capacity without sacrificing daily drivability. Designed for builds that have exceeded the holding limits of the Stage 3, the Stage 3+ steps up capacity while delivering smoother, more predictable engagement than a puck-style unit.

At the heart of this kit is a full-face carbon semi-metallic friction disc — a key distinction from the Stage 3's puck configuration. The full-face design distributes clamping pressure evenly across the friction surface, improving engagement quality, wear patterns, and service life under demanding conditions. It also provides better modulation in stop-and-go traffic compared to puck-style alternatives, making it SPEC's most versatile single-disc stage.

The disc hub is double-sprung with spring cover reliefs for flexibility, and all hub components are heat-treated for strength and long-term durability. Combined with a high-clamp pressure plate, the Stage 3+ delivers the holding power of a race clutch with engagement manners that remain manageable for regular street use.

Kit Includes:

• High-clamp performance pressure plate
• Full-face carbon semi-metallic friction disc
• High-torque double-sprung hub and disc assembly
• Release bearing
• Clutch alignment tool

Ideal Driving Applications:

• Street / Daily Driving
• Drag Racing
• Drift
• Road Racing
• Rally
• Pulling
• Autocross

SPEC clutches are proudly manufactured in the U.S.A. using advanced fabrication methods and strict tolerances, making them a trusted choice for performance enthusiasts and professional motorsport competitors alike.