I removed mine. I had to plug the receptacle with a 6mm capscrew.
It didn't help my MPG noticeably, but now I have an ironclad reason not to listen to the goofiness on the radio.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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