Well figures that the piping would arrive shortly after making my post. Can't let car modding wait till tomorrow so I went ahead and added it between the original bezel and the delete panel and I think it works. I went ahead and installed everything in the car to get the final verdict. I think...
16' Track pack owner here. After owning the car for almost a year I may have used the radio once...maybe twice? Would I really miss it if it wasn't there? No. Maybe the backup camera but the only place this car backs into is my garage so I can live with that. And honestly having all those number...
Was an X-pipe/reso delete part of what was tested? A kit just went up on corsa's webpage:http://www.corsaperf.com/viewpart.aspx?year=2016&make=Ford&model=Mustang&enginetype=5.2L+V8&partnum=14347&cfg=3921