Optimum-SR 10.4″ Single-Disc Clutch, Flywheel & Release Bearing


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  1. Proprietary spring technology features higher torque capacity & clamp load while providing excellent power modulation & release force
  2. Sprung hub designed to dampen oscillation in race applications
  3. Chromemoly steel flywheel & pressure plate increases strength & maximized heat-absorbing capabilities
  4. Strapdrive provides quieter operation & reduced NVH (noise vibration harshness)
  5. High-grade OE-type material clutch disc

Rebuildable Lightweight Clutch Offers Race Technology With A Stock Feel.

Those looking for a true racing clutch with factory driving characteristics will find Quarter Master® Optimum-SR™ 10.4″ Single-Disc LS Clutch Kits ideal. The kit’s lighter weight creates a reduced MOI (Moment of Inertia), allowing the engine to rev and de-rev quicker than a stock OE unit. All these features knock seconds off the stopwatch, while delivering a stock pedal feel and chatter-free operation. Holding up to 500 ft./lbs. of torque and 700 horsepower, kits include clutch, flywheel, release bearing and alignment tool. The single-disc clutch boasts billet construction and is 100% rebuildable. Additionally, the unit is constructed with proprietary spring technology and is compatible with OE-type hydraulic bearings or the Quarter Master® Tri-Lite II Hydraulic Systems.

  • Less rotating mass; is significantly lighter than stock clutch

  • Billet construction w/ proprietary spring technology & 100% rebuildable design for years of reliable service

  • Race-capable design, yet can easily be used for street driving

  • Stock pedal feel; can serve as heavy-duty stock replacement

  • Legal in Pirelli World Challenge & Continental Tire Series
  • 10.4″ single-disc can hold 700 HP & 500 ft/lbs of torque

Additional information

Input Shaft

GM LS, Mustang


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Clutch Discs


Disc Size


Clutch Series



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