Spec Clutch SF373F Stage 3 Plus High-Performance Clutch Kit

The Spec Clutch SF373F Stage 3 Plus is the flagship single-disc performance clutch kit for heavily modified street and race engines demanding maximum torque capacity with manageable daily drivability. Engineered for drivers who have outgrown what the standard Stage 3 can handle, the Stage 3+ delivers a step up in holding power while retaining a friendlier engagement feel and superior wear characteristics compared to full race-spec clutches.

At the heart of this kit is a full-faced carbon semi-metallic friction disc, a material chosen for its exceptional balance of friction coefficient, service life, and street manners. The hub assembly is double-sprung with spring cover reliefs to absorb drivetrain shock and vibration, while heat-treated components throughout provide the strength and durability needed for sustained high-torque operation.

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

Intended Applications:

• Street
• Drag Racing
• Drifting
• Road Racing
• Rally
• Autocross
• Pulling

All Spec Clutch kits and flywheels are SFI approved and designed, hand-built, and tested in the USA. Note: Unless installing with a new SPEC flywheel, the existing flywheel must be resurfaced prior to installation. A minimum 450-mile break-in period of primarily city/stop-and-go driving is required before full-throttle engagement or drag launches.