Spec Clutch SF673H Stage 2 Plus Performance Clutch Kit

The SPEC SF673H Stage 2 PLUS Clutch Kit bridges the gap between the Stage 2 and Stage 3 clutch systems, purpose-built for modified engines that demand more torque capacity without sacrificing street manners. It delivers the smooth, progressive engagement feel of the Stage 2 while offering a 15–20% higher torque capacity — making it the ideal step up for high-output builds.

Friction Disc Technology:

The kit features a multi-friction disc in a full-faced configuration, with carbon semi-metallic material on one side and Kevlar® on the other. This hybrid construction provides excellent heat resistance, strong bite, and impressive wear life across a wide range of driving conditions.

Key Features:

• High-clamp pressure plate for increased clamping force on modified powerplants
• Hybrid carbon-graphite and Kevlar® friction material for superior torque capacity and longevity
• Double-sprung hub with spring cover reliefs for flexibility and smooth engagement
• Heat-treated hub components for enhanced strength and durability under high loads
• Bearing and tool kit included for a complete, ready-to-install solution

Intended Use:

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

The SPEC SF673H Stage 2 PLUS Clutch Kit is designed, hand-built, and tested in the U.S.A., offering proven performance for drivers who need more grip than Stage 2 provides, while retaining the daily-drivable engagement quality that makes SPEC clutches a top choice for street and track builds alike.