Xtreme Heavy Duty Sprung Organic Clutch KitAt 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. Sprung Organic 1A Sprung organic clutch kits offer exceptional