The Wicked Bilt Electra-Steer Power Steering Kit for the 2008-2014 John Deere Gator HPX & XUV 620i, 625i, 825i, 850D, & 855D is a bolt on system that significantly reduces steering effort and diminishes steering wheel jerk caused by uneven terrain. This is a torque-sensing unit that increases assistance as torque or resistance increase at the wheels. Unit mounts under the dash and does not decrease leg room. The Gator UTV Electra Steer Power Assist Kit fits on all XUV and HPX models from 2008 to 2014 except for the XUV 550. This kit is BIGGER, BADDER, & BETTER than our earlier successful models.