would it at best be equal to reducing the frontal area of the car an amount equal to the smallest section of the pipe running through the car? or is there some benefit that i'm not catching on to? if it was very small of a pipe, i wouldnt think it would have any more benifet than the removal of an outside mirror... if it was very sizeable you'd be looking at removing seats for the space. then you might as well remove all the glass and cover the lower section of the interior with sheet metal like some race cars do.
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