Spec Clutch SN663H Stage 2+ Clutch Kit

The Spec Clutch SN663H Stage 2+ Clutch Kit is engineered for modified engines that demand more torque capacity than a standard Stage 2 clutch can handle. Bridging the gap between Stage 2 and Stage 3, this kit delivers the familiar street-friendly feel and engagement quality of the Stage 2 while providing a 15–20% higher torque capacity — making it an ideal upgrade for performance-built engines without sacrificing daily drivability.

Key Features:

• Multi-friction composite disc — full-faced configuration with carbon semi-metallic on one side and Kevlar on the other for optimized grip and wear
• High-clamp pressure plate for increased torque holding capacity over stock and Stage 2 units
• Double-sprung hub assembly with spring cover reliefs for flexibility and heat-treated components for long-term strength and durability
• Carbon-Kevlar friction material provides excellent wear characteristics and extended service life under demanding conditions
• Includes high-torque sprung hub and disc assembly, bearing, and installation tool kit — everything needed for a complete clutch replacement

Suitable Driving Applications: Street, Drag Racing, Road Racing, Rally, Pulling, Autocross

Spec Clutch is a leading manufacturer of high-performance clutch systems trusted by enthusiasts and race teams worldwide. The Stage 2+ is the perfect choice for drivers who have outgrown a stock or Stage 2 clutch but want to maintain excellent pedal feel and day-to-day livability.