Quarter Master brings race-winning clutch technology to the street with new Optimum-SR 10.4" Two-Disc LS Clutches. These clutches deliver a comparable-to-stock pedal feel and are capable of handling 1400 horsepower and 1000 ft./lbs. of torque.
Quarter Master, the industry leader in driveline technology, has continued its winning ways this season with brand-new Optimum-SR 10.4" Two-Disc LS Clutches. They have achieved standout results with the 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. They are currently offered for the C5 and C6 Chevrolet Corvette, Gen V Chevrolet Camaro, Pontiac G8/GXP and 2010 & newer Cadillac CTS-V with more applications to come. Both the race and street versions feature 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. The street version features 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.
- 10.4" two-disc design; can hold 1400 HP & 1000 ft./lbs. of torque
- Stock pedal feel without compromising holding capacity or durability
- Vented floater plate & grooved friction surfaces for enhanced cooling & longevity
- Billet construction & rebuildable design
- Features proprietary spring technology designed to require only a 10% increase in pedal effort over stock
- Compatible with OE hydraulic bearing systems or Quarter Master Tri-Lite II Hydraulic Release Bearings
- Available for C5 & C6 Corvette, Gen V Camaro, G8/GXP & CTS-V applications
![DIAMOND Racing EJ257 WRX DISH Pistons [Bore 100.5mm | Stroke 79.0mm | Rod 5.137 | C.D. 1.208 | Weight XXX | Pin .905 x 2.500 | CC's -22.0 | 56cc 8.3] (SUBARU EJ257 2.5L F4)](images/no_picture.gif "DIAMOND Racing EJ257 WRX DISH Pistons [Bore 100.5mm | Stroke 79.0mm | Rod 5.137 | C.D. 1.208 | Weight XXX | Pin .905 x 2.500 | CC's -22.0 | 56cc 8.3] (SUBARU EJ257 2.5L F4)")
