I just picked up my brand new 2013 GT Premium. My previous car was an 05 GT and I had a Borla Cat Back S Type exhaust on it. I'd love to put another Borla system on it but I'm wondering if I should save a lot of money and just go with the Axle Back Stingers. The quality of my old Borlas was top notch so I will get another set. Aside from being a better quality material than the OEM tubes that go back from the H Pipe to the mufflers, are there any other differences, maybe the sound is a bit different? I believe the diameter is the same, at least it was on my 05.