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I would think they won't do much at normal highway speeds but you gotta admit they look great.
Hope you find the info your looking for.
It would be interesting indeed.


? ok so get on the freeway and stick your arm out the window with your palm facing down, then then turn your palm facing forward and when the wind wraps your arm backwards tell me does the airflow matter? it does'n take much surface area to have an effect on drag or down force!