I thought that awfull sound was because of the muffler combined with the horrible rasp of a poorly maintained cheap 4 cylinder.
Those muffler things have not shown up in my area, if they do I'm sure the city council will ban them in about 2 weeks.
I honestly don't see the point of these cars, sure they can get 300hp out of some Acura's, but there FWD! The power can't be put down and they drive like crap.