The Wicked Bilt Electra-Steer power steering kit for the Polaris RZR 900 UTV is a bolt on system that significantly reduces steering effort and diminishes steering wheel jerk caused by uneven rough terrain. This is a torque-sensing unit that increases assistance as torque or resistance increases at the wheels. Unit mounts under the dash. This Polaris RZR Electra Steer kit fits on 2015-2019 models. This kit is BIGGER, BADDER, & BETTER than our earlier successful models.