Oh, I finally received my Borla Cat Back system. I see what they say about the tip size. I did not measure them but they look like 4 1/2" tips. I plan on polishing the lower side of the mufflers before I get them on. I hope they sound as good as yours.
I think I have decided on a Vortech 20th Anniversary Edition kit. From what I read, it is very reliable from past units and the black unit looks very factory. I also like that is uses the factory air filter box. I will wait to install it though to give the car a little more time for any engine issues to show up. I will most likely install it late this year during the winter. I just want to get it now in case they stop selling that black unit.
I finally have a tracking number and date on my Borla cat back system. Would you know of anyone that has installed a Procharger on a 2011 GT? I am just about ready to buy one and wanted to check with Mustang owners first.
Did you get a Cat Back system or a Axle Back system? I still am waiting for my Cat Back Touring system to be shipped and it has been 3 months now since I have paid for and ordered my system. I really don't mind the wait but I did pay for it already so it would be nice to get it.