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 all 900 models. This kit is BIGGER, BADDER, & BETTER than our earlier successful models.