Dynojet’s Secondary Clutch Spring Cup Kit for the Polaris RZR PRO XP adds vital durability to your secondary clutch spring. Made of billet, this is an upgrade from stock and is designed to keep the secondary spring aligned in the helix. This fits 2020-2021 Polaris RZR PRO XP vehicles, as well as 2021 Polaris RZR XP Turbo & RZR XP Turbo S