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      12-14-2008, 09:57 PM   #1
jml
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Drives: E90M3
Join Date: Dec 2008
Location: Austin, TX

Posts: 984
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Factory exhaust provide any aero benefit?

Any engineers want to take a stab at this? Seems odd that they spent so much time to make the bottom of the car smooth and closed in unless it was for a reason. The stock exhaust covers up that large hole under the trunk perfectly, and the valence on the rear bumper is supposedly a real diffuser this time.

Any thoughts?
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