This bearing and seal kit is perfect for the 2015-2017 Mustang owner who damaged some of these components at the track. Or perhaps some of these components failed while simply driving on the street. Maybe you are adding the rear half shaft upgrade kit or adding ring and pinion gears to your 2015-2017. Anytime you are taking apart the IRS setup in your Mustang it is a good idea to replace the bearings and seals even if it is simply preventative maintenance. Some 2015-2017 Mustang owners may want to paint or powder coat their IRS, which would be another great opportunity to purchase and install this Ford performance bearing and seal kit.