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Quarter Master Optimum-SR 10.4″ Two-Disc Mustang Clutch Kits

Lake Zurich, IL – The revolutionary 10.4″ two-disc clutch kits from Quarter Master are now available for Ford Mustangs. The kits include a true racing clutch with factory driving characteristics to replace the stock component.

226591-RQuarter Master Optimum-SR 10.4″ Two-Disc Mustang Clutch Kits feature a rebuildable billet clutch designed for higher-than-stock torque clamp loads while maintaining a near-stock pedal feel. The kits are produced specifically for newer Mustang GT, GT500, Boss 302 and Boss 302R applications. They are great for owners of high performance vehicles producing up to 1000 ft./lbs. of torque and 1400 horsepower.

The clutch itself weighs 33-percent less than the stock assembly; the lightweight clutch and pressure plate are designed to blend noticeable horsepower gains with smooth pedal engagement. The clutch design also decreases inertia, allowing the engine to rev and de-rev quicker than with the stock unit. The moment-of-inertia reduction is equivalent to an eight horsepower gain.

The clutches incorporate engineering know-how derived from the rich Quarter Master racing heritage and are legal for use in the Pirelli World Challenge and Continental Tire Series. However, they can also easily be used for street driving. Quarter Master Optimum-SR 10.4″ Two-Disc Ford Mustang Clutch Kits come with the clutch, flywheel, release bearing (if applicable) and release bearing adapter. Iron and full-race Mustang kits are also available.

Quick Facts

Product: Quarter Master Optimum-SR 10.4″ Two-Disc Ford Mustang Clutch Kits

Part Number: #226590-R (2007-2014 Mustang GT500 (Stock Release Bearing)); #226590-RS (2007-2014 Mustang GT500); #226591-R (2011-2014 Mustang GT & 2012-2013 Mustang Boss 302)

Street Price: $2,508.27

Social Media Pitch: Quarter Master Optimum-SR 10.4″ Two-Disc Ford Mustang Clutch Kits offer a true racing clutch w/ factory driving manners to replace stock

Features & Benefits:

  • Super lightweight & designed for higher torque clamp loads than stock w/ near-stock pedal feel
  • Weigh 33% less than stock assembly; can hold up to 1400 HP & 1000 ft./lbs. of torque
  • All-billet construction w/proprietary spring technology; rebuildable design ensures this will be your last clutch
  • Legal in both Pirelli World Challenge & Continental Tire Series,  yet can easily be used for street driving
  • Kits include 10.4″ two-disc clutch, flywheel, release bearing (if applicable) & release bearing adapter

See the PDF: Quarter Master Optimum-SR 10.4″ Two-Disc Ford Mustang Clutch Kits