There are several kit options, please measure your parts before ordering!! High quality aftermarket bearings along with dual lip axle seals. These are high quality parts from brands such as: Nachi, KOYO, NTN, Timken, SKF The large housing o-ring is NOT included as a cost saving measure, this o-ring can be reused as long as it is not damaged. Fits 2015 and newer G2 500/570/650/800/850/1000/1000R ATVs THE REAR Diff is NOT XMR. The 570/650 XMR machines got a stock differential, not a true XMR differential. Please check to see if your differential uses this type of gears before ordering!! If you are unsure, please contact us! Late G2 STD Rear Differential Rebuild Kit Quick Identification 2 Bearings on Ring Gear 52mm Axle Seals OD 16mm Pinion Shaft OD 2015 and Newer Differential