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Old 08-24-2009, 01:36 AM   #23 (permalink)
Christ
Moderate your Moderation.
 
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They will prevent potential cross flow from under to outer, and from outer to under - remember, the under belly of your car has several low pressure sections that might actually be pulling in air from the outer area.

You can also add inner and outer skirts which prevent air from getting to the tire faces at all, and help streamline the underbelly of the car after getting a belly pan.
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