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Old 06-02-2012, 09:55 AM   #11 (permalink)
SlideWRX
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Join Date: Jun 2009
Location: SE Michigan
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Moostange - '07 Ford Mustang GT
Last 3: 21.8 mpg (US)
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Since that part of the wing sits on the body, it probably has slightly different airflow, and wants a different profile to the wing for best use. I'll bet the serrations help without messing up airflow over the rest of the wing.

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