These axles are compatible with the following 4X4 Models These axles have 36 teeth on the inboard spline, please verify your OEM axles have 36 teeth on the inboard spline prior to ordering. 2006 Polaris 450 Sportsman 2006 Polaris 500 Sportsman 2006 Polaris 500 Sportsman HO 2006 Polaris 700 Sportsman 2006 Polaris 800 Sportsman 2007 Polaris 450 Sportsman 2007 Polaris 500 Sportsman 2007 Polaris 700 Sportsman 2007 Polaris 800 Sportsman 2008 Polaris 500 Sportsman 2008 Polaris 500 Sportsman HO 2008 Polaris 800 Sportsman 2008 Polaris 800 Sportsman HO 2009 Polaris 500 Sportsman 2009 Polaris 500 Sportsman HO 2009 Polaris 800 Sportsman 2009 Polaris 800 Sportsman HO 2010 Polaris 500 Sportsman 2010 Polaris 500 Sportsman HO 2010 Polaris 800 Sportsman 2011 2X4 Polaris 400 Hawkeye HO 2011 Polaris 400 Sportsman HO 2011 Polaris 500 Sportsman 2011 Polaris 500 Sportsman HO 2011 Polaris 800 Sportsman 2012 2X4 Polaris 400 Hawkeye HO 2012 Polaris 400 Sportsman HO 2012 Polaris 500 Sportsman 2012 Polaris 500 Sportsman HO 2012 Polaris 800 Sportsman 2013 2X4 Polaris 400 Hawkeye HO 2013 Polaris 400 Sportsman HO 2013 Polaris 500 Sportsman 2013 Polaris 500 Sportsman HO 2013 Polaris 570 Sportsman 2013 Polaris 800 Sportsman 2014 Polaris 400 Sportsman HO 2014 Polaris 570 Sportsman 2014 Polaris 500 Sportsman HO 2014 Polaris 800 Sportsman ***500 SPORTSMAN HO (MFG AFTER 10/3/06)***