Spec Clutch SC421YS Stage Performance Clutch Kit - 1

The SPEC SC421YS Stage 1 Clutch Kit is a high-performance upgrade designed for enthusiasts seeking improved clutch performance with excellent street drivability. This complete clutch kit features integrally molded carbon-Kevlar based organic friction material that delivers smooth engagement while maintaining exceptional durability under demanding conditions.

Key Features:

• Carbon-Kevlar high-performance organic lining with integrally bonded steel backing for superior strength under high clamp loads and temperatures
• High-clamp pressure plate for increased torque capacity
• Double-sprung hub with spring cover reliefs for flexibility and smooth power transfer
• Heat-treated components throughout for enhanced strength and durability
• Steel-backed multi-compound woven organic friction material
• Includes bearing and installation tool kit
• SFI approved for safety and performance

Applications: Ideal for street driving, drag racing, drifting, road racing, rally, pulling, and autocross use. The Stage 1 design provides the perfect balance between daily drivability and performance, making it suitable for naturally aspirated and mildly modified forced induction engines. This kit offers stock-like engagement characteristics with improved torque capacity and wear resistance compared to OEM clutches.

Note: Existing flywheel must be resurfaced prior to installation. Break-in period of 450 miles with primarily city/stop-and-go driving is required before full-throttle engagement.