Xtreme Heavy Duty Cushioned Ceramic Clutch Kit Electrocardiogram Show Right Bundle Branch Block Stock Illustration. At Xtreme Clutch, we strive to offer a variety of clutch options for each vehicle to ensure a clutch solution is available for every vehicle application. Whether you are modifying a road vehicle or building a race car from scratch, we have the clutch solution for you. Our upgrades are divided into different stages depending on the friction disc material and the number of friction discs. Cushioned Ceramic 1C The Xtreme Clutch cushioned ceramic range of upgrades offers exceptional heat capacity and torque capacity whilst providing cushioning between the friction surfaces of the disc, ensuring excellent driveability. The discs still retain the sprung hub that helps to reduce shock loading. These kits are commonly used in vehicles that are used on the road occasionally but mainly focused on track applications. Recommended for: Track (Motorsport) focused cars that are also occassionally used on the public roads.