I was driving around town (woodbridge the other day) and this guy in a white legend had the largest muffler I have ever seen (much less on a legend). The opening looked like the width of a standard pie pan. At the exxon on the Pr. William Pkwy he wanted to line up and I declined - but let me tell you that exhaust sounded like doo doo . Like a 24' uhaul truck in heat - just very busy and loud.
Anyways, he said it was a maximum muffler.
KNLNGUS