Car's got an aftermarket Kriessieg exhaust setup. Never heard of them before, but wow. I'm going to include a stock video, too. The difference is unbelievable.
Stock
http://www.youtube.com/watch?v=SEHMV...ch%20kit%20car
Kriessieg
http://www.youtube.com/watch?v=jAqFB...ch%20kit%20car
http://www.youtube.com/watch?v=jAqFB...ch%20kit%20car
I want to drive that thing through tunnels all day long.