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Old 01-05-2011, 10:06 AM
Smokewagun Smokewagun is offline
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2010 Ford F-250
 
Join Date: Jun 2005
Location: Illinois
Vehicle: 2010 Ford F-150
Posts: 1,590
From my experience, yes, without a doubt. The air flow over your cab immediately dips down toward the bed. The cap will keep the air flow high and make it easier to flow over the trailer.
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