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Old 01-10-2009, 10:16 PM   #185 (permalink)
basslover911
Master EcoModder
 
Join Date: Sep 2008
Location: Fort Worth, Texas
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Silver Turtle - '02 Ford Focus Zx3
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^^ I don't think it help much, if any.

Now if you had a full under tray then it would make a difference, but the air gets "dirty" anyway after the front so it matters extremely little. If anything, its amking your intake and engine run cooler thus affecting fuel efficiency.
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