<VV> mufflers airflow.

[Paul Abel]

Try this...hold a candle in your left hand (exhaust). Then cup your 
right hand (car) and with the candle (exhaust) behind your cupped hand, 
(car) blow into your hand (rearward air flow). The flame will magically 
move TOWARD you. (exhaust being sucked forward?).....Ask Dr. 
Science....(I'm not a real doctor..I have a MASTER'S degree)

-Paul -
65 500 140/4 (side exiting exhaust)