Duratec
Local muffler shop. Aprox $325. 2.5" pipe starting after flex. Custom y-pipe just before fuel tank. Splits to two small glass packs and then very nice large tips. Was too loud so I put a third large inline resognater ater the cat, before the fuel tank. Starts/idles very nice. Sounds great in the car, especially when revving. I found, however, that it only sounds good when you are inside the car, probably due to induction (giant AFE cone filter, no air box). When wifey drives it down the strett and gases it, it sounds just a tad ricey and I don't like that. Maybe I'm crazy, but I really wanted it to sound just like a stock Mustang GT!!! Also, in low RPMs, like 1,200, under heavy load (stupid ATX), the drone can still be somewhat loud even with third large glass pack resognator (stock resognator removed).