EXEDY carbon discs are able to perform through long durations of high rotational velocity due to our precise application of carbon. Carbon material also possesses a ''non-stick'' characteristic that eliminates disengagement problems. Available in single, twin and triple designs with both rigid or damper discs for a full range of power holding capacity. Carbon-D: The next generation of clutch systems by EXEDY is the Hyper Carbon-D carbon clutch system. Carbon-D was developed to achieve the ultimate goal of comfort and streetability by absorbing noise and vibration from drivetrain such as the differential, transmission and engine. The Carbon-D system is designed to protect the drivetrain by absorbing and dissipating ''shock torque'' by utilizing EXEDY Patented Technology. Superior engineering enables the Carbon-D clutch system to posses an ideal clutch engagement position, increased clamp loads and lower pedal effort, while the unique carbon fiber friction material allows comfortable half-engaged clutch operation and responsive gear changes. The EXEDY Hyper Carbon-D is available in both single and twin clutch configurations. Low Inertia Design: The weight of a carbon clutch disc is one third that of a metallic disc. Utilizing a high friction coefficient Hyper Carbon disc which allows for quicker shift response. Low inertia discs allow the transmission to synchronize in a shorter space of time eliminating time loss during shift changing while also reducing the applied load to the synchronizer. Easy to Handle: Semi-carbon clutches offer lightweight, high heat resistance and a stable friction coefficient. EXEDY carbon clutches are tuned so that at a lower temperature, engagement feeling is improved and conversely at high temperatures, engagement is ideal for spirited driving. All EXEDY Racing Hyper Carbon Series Clutch Kits carry SFI 1.2/1.5 Certification. Which means, when you buy these products you can be confident they are certified for use in competitive motorsports.