Brand new exact replacement pivot shaft bushing for the front/rear control arms. Brand new high quality machined steel part that is exactly the same as the original! Zinc plated for corrosion resistance. This replaces Polaris part number 5139966. The shaft is 15.8 mm x 50.8 mm long. Most machines use 2 per a-arm so be sure to order 2 if replacing both. Depending on the machine, this pivot shaft bushing is used on the front and/or rear control arms. Sold as a pack of 8. FITS FOLLOWING MODEL(S): 2017-'19 ACE 570 2017-'19 ACE 900 2016-'23 GENERAL 1000 2017-'22 GENERAL 4 1000 2020-'23 RANGER 1000 2022-'23 RANGER 570 2020-'23 RANGER CREW 1000 2022-'23 RANGER CREW 570 2019-'20 RANGER CREW XP 1000 2018-'20 RANGER XP 1000 2017-'18 RZR 4 900 2017-'20 RZR 900 2018-'22 RZR RS1 2020 RZR S 1000 2019-'21 RZR S4 1000 2021-'23 RZR TRAIL 900 2021-'23 RZR TRAIL S 1000 2020-'23 RZR TRAIL S 900 2017-'24 RZR XP 1000 2017-'24 RZR XP 4 1000 2017-'21 RZR XP 4 TURBO 2017-'21 RZR XP TURBO REPLACES POLARIS PART NUMBER(S): 5139966 We make every attempt to ensure every items fitment is accurate. We do the testing on each item before its listed for sale to ensure fitment and quality. Items may fit multiple years and models listed. Returns are subject to 15% restocking fee.