Spec Clutch SB303H Stage 2 Plus Performance Clutch Kit

The SPEC SB303H Stage 2 Plus Clutch Kit is engineered for modified engines that demand more torque capacity than a standard Stage 2 clutch can deliver. Bridging the gap between the Stage 2 and Stage 3, it retains the familiar, daily-drivable feel and smooth engagement of the Stage 2 while delivering 15–20% higher torque capacity — making it an ideal upgrade for street-driven performance builds.

The disc uses a full-faced, multi-friction configuration with carbon semi-metallic material on one side and Kevlar® on the other. This hybrid construction provides excellent wear characteristics, consistent bite, and long service life under demanding conditions. The hub is double-sprung with spring cover reliefs for improved flexibility, and all hub components are heat-treated for strength and durability.

Kit Includes:

• High-clamp performance pressure plate
• Multi-friction carbon semi-metallic / Kevlar® full-faced clutch disc
• High-torque double-sprung hub and disc assembly
• Throwout bearing
• Installation tool kit

Ideal Driving Applications:

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

SPEC clutch kits are designed, hand-built, and tested in the U.S.A., ensuring consistent quality and performance across every application.