Just recently took the cats off my 13 GT put a off road H Pipe on along with resonator delete and pypes pype bomb catback system. Its really loud which isn't that much of an issue but the exhaust note sounds pretty bad (imo) almost as if its not flowing as smooth as it shoul. I was wondering if changing out the axle back portion of my catback would solve this issue? Thinking of changing to a Roush or Borla axle back