I just purchased a 2017 Mustang GT with the Performance Pack and love it. The first thing I want to do is get an axle back exhaust. I am pretty set on either the Ford Racing by Borla Sport or Touring. Do any of you run these and whats a good price on them. So far I see them on AM for 789. Do they ever go on sale. I am new to the Mustang community, I drove Subaru WRX's and Sti's for the last nine years. Thanks in advance.