Duraclutch RZR & RANGERS 570s Duraclutch R-Series Kit #15-538SKU: 15 538 The all new Duraclutch R Series Kit #15 538 for Polaris RZR & RANGER 570s. The premier Polaris RZR or RANGER 570 clutch replacement kit its not just a replacement, its a serious upgrade! Smoother starts, better engine braking & longer belt life, all built into a durable primary and secondary to last you for years to come. Thru 2 years of development we paired our R Series primary with a well proven post tied secondary, now for the RZR 570s