Here is some information on the Draw-Tite site. Although towing is not recommended for a Mustang it can be done. Need to look closer at fitment on BOSS. GT500 is listed as a fitment.
#24863 fits 2012 and 2013...probably previous years too.
http://www.draw-tite.com/content/fitguides.aspx
#24863 fits 2012 and 2013...probably previous years too.
http://www.draw-tite.com/content/fitguides.aspx