yah,,superplugged,,,,,lot of folks dont know that dieselmufflers are different than gas mufflers,so soot doesnt plug them up,,,,,,had a diesel generator at work last week,,ran like crap,looked underneath,,dude said heput new exhaust on it a few months ago,,,,got an auto muffler at autozone,,well i uncorked it,,ran great,,,lotsa chunks of carbon in it!!!we put on a glasspack,cause it was turbo,,quiet,and no clogging,,,,