SuperATV RackBoss Heavy Duty Rack and Pinion for Polaris RZR 800 4 (2010+) 100% Fitment guaranteed Complete end-to-end steering system that requires no modifications Includes super duty tie rod ends and tie rods Designed to withstand extreme abuse from massive tires, monster whoops, and the toughest of terrains 65% larger housing and 15% larger rack gear than stock Polaris RZR 800 : 2008+ Polaris RZR S 800 : 2009+ Polaris RZR 4 800 : 2010+