A
type of muffler that is mainly found on
rice burners(toyota, nissan, etc.) that lets out a low-pitched hum to make the car
sound like it has some power.
Dumbass: Dude! that supra sounds awesome! I bet that thing could tear it up on the quarter mile!
Smart person: No, that's just a shit whistle. The
car will probably pull about a 15 sec. 1/4 mile.