I have read many threads on here and just need a few questions answered. With any of the Magnaflow systems, DI/DO or DI/SO is there any cabin drone when ther are no mufflers in the back? How loud is are these systems and which sounds the best? It seems that this is a popular setup. I would love the Mustang sound but know that is hard to do. As long as this would make my car sound like a real V8 not some funky sound like my old flowmaster catback did.