stock cat back gt

Looking for some insight on how safe it is to run the stock tune with catless long tube headers. Any info would be appreciated. 2018 GT 6-speed stock aside from a catback.

I just upgraded to a cat back so my stock exhaust is available and will fit your 2015-16-17 Mustang GT. It was only used for 12k miles and is still in one piece (never cut for axel backs or anything). Its currently located in Algonquin but I may be able to meet somewhere along highway 90...