Spec Clutch SD143F-6 Stage 3+ Street/Strip Performance Clutch Kit

The SPEC Clutch SD143F-6 is a Stage 3+ performance clutch kit designed for high-powered street and race applications that demand both aggressive performance and manageable daily drivability. This flagship stage clutch delivers an exceptional balance of power handling capability and user-friendly engagement characteristics.

Key Features:

• Carbon semi-metallic full-faced disc material for superior friction coefficient and extended service life
• Torque capacity rated up to 431 ft-lbs for high-performance applications
• Application-dependent hub design available in sprung or rigid configurations
• Double sprung hub features spring cover relieves for enhanced flexibility
• Heat-treated hub components ensure maximum strength and durability
• SFI approved for competition use
• Manageable pedal effort with smooth, friendly engagement

The Stage 3+ clutch kit is SPEC's premier choice for street/strip vehicles requiring reliable power transfer without sacrificing drivability. The carbon semi-metallic material offers unparalleled performance characteristics in a single package, making it ideal for modified vehicles that see both street duty and occasional track use. All components are designed, hand-built, and tested in the USA to strict quality standards.