Spec Clutch SC425Y Stage 5 Performance Clutch Kit

The Spec Clutch SC425Y Stage 5 Clutch Kit represents the peak of SPEC's single-disc performance clutch lineup, engineered specifically for drag racing, pulling competitions, and extreme high-power applications. This race-only clutch kit is built around a full-metallic sintered iron disc with the highest possible friction coefficient available in SPEC's single-disc range, delivering instant, aggressive engagement under the most punishing conditions.

The SC425Y is designed for slipper clutch and progressive torque-induced engagement applications, making it a go-to choice for seriously modified drag race and pulling engines that demand maximum holding power and heat resistance. Unlike street-oriented stages, the Stage 5 features a solid 12-rivet rigid hub with a heat-treated disc assembly for exceptional strength and durability under repeated race launches.

Kit Includes:

• High clamp performance pressure plate
• Full-metallic sintered iron friction disc
• High-torque solid rigid hub and disc assembly
• Release bearing and installation tool kit

Key Features:

• Highest friction coefficient of any SPEC single-disc stage
• Solid 12-rivet hub for maximum power transfer efficiency
• Heat-treated assembly for strength and long-term durability
• Designed for slipper clutch and progressive engagement applications
• SFI Approved

Recommended Driving Types: Drag Racing, Pulling

Important Note: The Stage 5 is a race-only clutch and is not suitable for street driving due to its harsh, instantaneous engagement characteristics. This kit is best specified in consultation with a SPEC technical representative to ensure proper configuration for your specific application and power level.