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Originally Posted by MitchT
they are plastic inserts into the alum undertray, the bottom is very f1 it is flat from front to rear, leading into the rear diffuser, most cars have this stuff for looks, it actually works on this car.
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Interesting stuff. So they are NACA ducts pretty much ?? are they cooling anything in particular like the rear brakes or rear diff ??
The underside of the M3 is about as sexy as the underside of a Buick.
