I have a 2012 6.2L, when I bought it, it was basically open headers and had the worst drone ever. So I took it to a shop and told them to quiet it down. They put a muffler on and dumped it right at the back door which made it quiet but within a week I blew the baffles out of it. I am on my 3rd one now(we've tried different brands and sizes) and im tried of it being in the shop. Since I have put a muffler on it, it constantly has idle issues and sometimes just shuts off. Im looking to just start fresh from the headers back (no CATS) something that runs out the back or after the rear axle. Any suggestions on a good after market exhaust that I wont blow out and wont have a killer drone noise???