I went to a few local muffler shops, and asked how much it would be for them to install a dual exhaust system that i brought them. All of them said it would depend on how well the system fits. My question is, which brand exhaust system fits the 3.8L V6 Mustangs the most like a glove? Also, one muffler shop said that leaving the y-pipe, then splitting would cause a problem because the y-pipe would rub the axle if i hit a hard bump. Is that true at all? Also, what is the most trustable and cheapest online site to get a stainless steel system?