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


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Rebuildable, Lightweight Clutch
Holds 1400 HP & 1000 Ft/Lb TQ,
While Offering Stock-Like Pedal Feel

Quarter Master®, the industry leader in driveline technology, has continued its winning ways with Optimum-SR™ 10.4″ Two-Disc LS Clutches. They have achieved standout results with a Camaro in the GRAND-AM Continental Tire Sports Car Challenge Series, including a first and second-place sweep at the Indianapolis Motor Speedway. Now, with lessons learned from racing, and with the data from extensive drivability testing, Optimum-SR™ LS Clutches are available for street use.

Features a spring designed to require only a 10 percent increase in pedal effort over stock, with stock-type modulation control. The clutches are capable of handling 1400 horsepower and 1000 ft.-lbs. of torque. Features a sprung hub, marcel-type discs with organic rag-type friction for smooth engagement. A vented floater plate and grooved friction surfaces provide better cooling as well. Featuring aircraft-grade bolts and hardware with an all-billet construction, each clutch is completely rebuildable and can be used with OE hydraulic bearing systems or Quarter Master® Tri-Lite II Hydraulic Release Bearings.

  • 1400 HP & 1000 Ft/Lb-Capable

  • Near Stock Pedal Feel/Power Modulation

  • CNC Billet Design Is Easily Rebuildable

  • Lighter Than Stock Clutch

Additional information

Input Shaft

GM LS, Mustang


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Clutch Discs


Disc Size


Clutch Series



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