This front prop shaft carrier bearing is used in the 2018-2021 RZR XP 4 Turbo. This is one of the weak points in the RZR and are constantly being abused and put to the test so they wear out quickly. The bearing will freeze to the shaft then it rips the rubber apart. Replace it before it does damage to your drive train and leave you stranded. This bearing is also designed to reduce vibration and noise that can happen with the stock bearing. Sold Each. Exact replacement for Polaris part numbers 3515040. NOTE: The 2018-2021 RZR XP Turbo and RZR XP 4 Turbo do used different carrier bearings. Be sure that this is the correct bearing for your machine. FITS THE FOLLOWING MODEL(S): 2018-2021 RZR XP 4 Turbo (Fits four seater models ONLY) REPLACES POLARIS PART NUMBER(S): 3515040