Spec Clutch SN573F Stage 3 Plus Performance Clutch Kit

The SPEC SN573F Stage 3 Plus (Stage 3+) clutch kit is the flagship performance clutch solution engineered for heavily modified, high-powered street and race engines that demand more torque capacity than the standard Stage 3 can provide. Designed to deliver a manageable and street-friendly engagement feel, the Stage 3+ strikes the ideal balance between aggressive performance and daily drivability.

At the heart of this kit is a full-faced carbon semi-metallic friction disc — a material chosen for its exceptional combination of long service life, high friction coefficient, and superior drivability characteristics. Whether you're pushing hard on the drag strip, carving corners on a road course, or driving to the track, the Stage 3+ adapts to demanding conditions without sacrificing pedal feel or longevity.

Kit Includes:

• High-clamp performance pressure plate
• Full-faced carbon semi-metallic friction disc
• High-torque sprung hub and disc assembly — double-sprung with spring cover reliefs for flexibility and heat-treated components for strength and durability
• Release bearing
• Installation tool kit

Key Features:

• Carbon semi-metallic full-faced friction material for unparalleled wear life and friction coefficient
• High-clamp pressure plate for increased torque holding capacity beyond the Stage 3
• Sprung hub design absorbs driveline shock and reduces vibration for street-friendly engagement
• SFI approved construction
• Rated for up to 357 ft-lbs of torque

Intended Use: Street, Drag Racing, Drift, Road Racing, Rallye, Pulling, Autocross

The SPEC Stage 3+ is recommended for street/strip use and is part of SPEC's seven-stage single-disc clutch lineup, sitting at the top of the street-capable range before transitioning to race-only Stage 4 and Stage 5 units.