[radioranger]

I saw an article that showed a folding rear door cover on a big semi that brought the airflow in after the end of the trailer, question , has any one tried to add a extension to the top of the tailgate lip to effectively slowly bring the air back further before it mixes with the other turbulent air from under the truck I thought of this also because Chevy claims their new tailgate spoiler increases mileage,, the top plastic piece screwed to the tailgate has a flat extended surface, why not stretch it back a foot more or whatever will work , same thing under the rear bumper , add a piece of material to extend the airflow further back any ideas seems like an easy mod, or a flat bed cover could stretch back past the gate.