Ok I will probably add a muffler to 4in exaust. Was waiting to do turbo when the stock one dies it has 260k on it so it has to be close. All I have is the edge tunner right now. But will go to a chip once I change everything else on my list.
That is the plan.I am going to drag my 12k lb fifth wheel across the country through the smokes and back when the kids get out of school. I am going to do one mod a month so it does not look like so much money to the wife.
I did the 4" straight pipe on 2 trucks diamond eye on the first and AFE on the second, The AFE was a much nicer kit and easier to install. both worked well and the noise was not bad at all, I am a little hard of hearing but the wife says its fine.
My old lady is a penny pincher but I can't complain she paid cash for my truck and camper in the last year. Now she has me on a tight leash. But she knows I will get at least 10 years out of this truck like I did the last used truck I bought.
2 of my 7.3's are muffler delete and can tell you the dually is not too bad but the Excursion is very loud.
As far as a chip or programmer PHP Hydra hands down. Got a dp tuner in the dually and it hasn't worked since it's been installed, they are also known to damage motors with their tunes. Also have run diablo sport and edge and they aren't even close to the Hydra. Second best is a TS chips but their technology is 10+ years old.