Quote Originally Posted by fcman
How's Porsche for you? (BTW, I did not search hard for this, this was the first website I looked at)

"At the rear of the car, the integrated WING is combined with an underbody diffuser featuring vertical fins. The resulting tail section generates ground-effects downforce with only minimal additional drag."


http://www.porsche.com/english/int/c...gn/default.htm
Bingo! Was waiting for someone to mention Porsche