We do this to free up HP by flowing more air out!!!more air in and more air out... more HP. you see how that works....?I wish you lived on my street you would hate your self when my wifes 5.9L V8 350z in done..with no exhust....
I think what was being complained about were the people who drive a completely STOCK civic and feel the need to put that exhaust and only that exhaust on their car. I personally prefer imports but it bothers me when people do that too.