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Quarter Master Optimum-SR 10.4 in. Single-Disc Clutch/Flywheel/Release Bearing Kits for 2005-2013 CORVETTE, 2008-2009 G8 - 121591-R
Part Number: QTM-121591-R
Quarter Master Optimum-SR 10.4 in. Single-Disc Clutch/Flywheel/Release Bearing Kits
Clutch Kits, Chevy Corvette C6 Clutch Kit, Single Disc Optimum SR Clutch Kit
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Estimated Ship Date: Nov 11, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
121591-R
Part Type:
Product Line:
Summit Racing Part Number:
QTM-121591-R
Clutch Usage:
Performance
Clutch Disc Quantity:
1
Flywheel Included:
Yes
Disc Diameter (in.):
10.400 in.
Throwout Bearing Included:
Yes
Throwout Bearing Style:
Hydraulic
Alignment Tool Included:
Yes
Pilot Bushing Included:
No
Flywheel Material:
Chromoly
Counterweight Assist:
No
Mounting Hardware Included:
Yes
Quantity:
Sold as a kit.
Notes:
Will not fit ZR1.
Quarter Master Optimum-SR 10.4 in. Single-Disc Clutch/Flywheel/Release Bearing Kits
Quarter Master Optimum-SR 10.4 in. single-disc clutch/flywheel/release bearing kits offer race technology with a stock feel. These are true racing clutches with factory driving characteristics, lighter in weight for reduced MOI (Moment of Inertia), allowing the engine to rev and de-rev quicker than a stock OE unit. Together, these features knock seconds off the stopwatch, while delivering a stock pedal feel and chatter-free operation. Holding up to 500 lbs.-ft. of torque and 700 hp, kits include clutch, flywheel, release bearing, and alignment tool. The single-disc clutch boasts billet construction, is 100 percent re-buildable, constructed with proprietary spring technology, and is compatible with OE-type hydraulic bearings or the Quarter Master Tri-Lite II hydraulic systems. Those looking for a true racing clutch with factory driving characteristics will find Quarter Master Optimum-SR 10.4 in. single-disc clutch kits ideal.
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