pascaljackson wrote:how can this be legal?
There is a free section of aero at the front of the floor section. It is what allows the sidepod fin flow conditioners to be in place. Last year Sauber put mini-cooling chimneys here like the large ones we saw pre-2009 (Introduced in Melbourne). This area allowed Mclaren's little wingletss they used on the inside of their U-pods also last season.. Sauber have taken it further this year with a full length winglet.
EDIT: I forgot about the cutouts in the top of the sidepods like McLaren in 2010 and Ferrari in 2011.