I just have a normal cap for the truck but it has recessed windows to aid with the aero. I can't modify the cap much because I need in and out for work often. I am looking into the wheel covers and possibly a belly pan. The pan seems like it would be the most effective since I could just have something that bolts up to the ladder frame that could be removed easily for maintenance. Have you heard of anyone doing a belly pan with a truck?
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