the exhuast system(5" magnaflow) was on the trk when i purchased it from my local dodge dealer. i'm always driving around town looking and listening for other cummins and the exhuast on the trks to get a comparision on exhuast tones. this 5" is rather load in town when the fuel is put to it.
i would have rathered a tone that was a little raspy/flutter like my 7.3L

i would say either manufactor is probably what and what. the only diff. would be the muffler