Teamspeed says the yellow sticker is hiding a reflector strip. I beg to differ. My guess is that it is hiding an inlet /outlet kind of slat under the wing. The corners seem to give away some kind of recession under the moving part of the wing.
Also, making the reflector strip that narrow would look almost as silly as the reflector strip on the 997 ...

porsche 911 4s 6.jpg


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Porsche, seperates LeMans from LeBoys