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      03-04-2017, 01:19 AM   #4
apexlocator
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Drives: 2014 M5
Join Date: Feb 2016
Location: socal

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So I read through about 2/3rd of the post until OP started throwing out specific numbers. Since my life is based on the principle of fuzzy math, I guess I'm a prime M-taxpayer on paper

But being around cars and modding for so many years, I've learned, like most, that aftermarket CF parts are strictly cosmetic. You are right OP; most aftermarket manufacturer don't have the expertise and/or $$$ to wind tunnel test these aero bits. They just copy visual design cues from the real race cars.
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