Spec Clutch SM803H Stage 2 Plus Performance Clutch Kit

The Spec Clutch SM803H Stage 2 Plus Clutch Kit is engineered for highly modified engines that demand more torque capacity than a standard Stage 2 clutch can handle. Bridging the gap between the Stage 2 and Stage 3, this kit delivers the street-friendly drivability and smooth engagement feel of the Stage 2 while providing a 15–20% higher torque capacity — rated up to 499 ft-lbs at the crank.

At the heart of the Stage 2 Plus is a multi-friction composite disc in a full-face configuration, combining carbon semi-metallic material on one side with Kevlar on the other. This hybrid friction pairing maximizes torque grip and wear resistance without sacrificing the progressive, predictable engagement that makes the Stage 2 series a favorite for daily-driven performance builds.

Key Features:

• High-clamp performance pressure plate for increased clamping force
• Hybrid carbon-graphite and Kevlar multi-friction full-face disc
• Double-sprung hub with spring cover reliefs for flexibility and smooth power delivery
• Heat-treated hub components for enhanced strength and long-term durability
• High-torque sprung hub and disc assembly
• Throwout bearing and alignment tool included

Intended Use: Street, Drag Racing, Road Racing, Rally, Autocross, Pulling, and Drift

The SM803H Stage 2 Plus is the ideal upgrade for modified, high-output engines that still see regular street duty. Designed, hand-built, and tested in the U.S.A., Spec Clutch kits are engineered to deliver race-proven performance without compromising daily drivability.