I don`t have any sound clips but if i get some time i`ll try and record one soon.
To install a catback you really don`t need an exhaust shop. I did mine in my garage, I just backed the truck up on ramps. It only takes simple hand tools.
If i remember correctly i needed to cut the pipe because i couldn`t get the entire pipe plus the muffler out from over the axle due to limited ground clearance. If it was on a lift i`m sure i could have taken it out in one piece.