Man you people must drive like assholes, none of my vehicles have usually had mufflers, with the exception of my old 5.0, which ran un-muffled for awhile(sounded like shit), but still even when I had the flowmasters with dumps it was very loud, my DSM was a 3 inch open downpipe, and both of my trucks have been open exhaust all the way back, present truck included, 3.5 inch from the turbo back, no cat (it's a diesel), and no muffler. You people somehow pissed them off.