All Balls Racing – A-Arm & Control Arm Bushing Kits, including the front lower A-arm bearing kit for the 18-22 Polaris RZR RS1, front upper kits for the 16-21 Honda Pioneer 1000 and the 15-16 RZR 4 900, both listed as two kits required per vehicle, along with axles for the 2022 Ranger XP 1000 EPS Premium, the 14-22 RZR XP 1000 and the 16-18 General 1000 EPS. The bearing kits replace the pressed bushings and seals in the control arm ends with sealed units that keep silt and pressure-washer water out of the pivot. On a side-by-side those pivots carry every landing and every rock hit, and once they wear the arm moves where it should not: camber changes under load, the machine tramlines in whoops, ball joints and shock bushings take the shock instead, and steering feel turns numb. Fresh A-arm bearing kits put the suspension geometry back where it was engineered, quiet the front end, and stop the clunk on throttle transitions. Press square and grease before the seals seat. Upper and lower kits are not the same part, so tell us your year, model and arm position and we will confirm the correct kit and quantity before you order.