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Old 07-27-2011, 12:27 PM   #2 (permalink)
wyatt
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They have them because NASCAR has them on lots of their cars. NASCAR has them for downforce. Effectively it is pushing the leading edge further forward and lower to the ground, forcing more air over/around the car, and allowing less under. It should be good for aero, but as all things aero, YMMV (literally!).
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