Had it up on the interstate going 75 into a 30 mph crosswind. Pretty disappointed. It sounded like a hurricane between the truck rear window and cap front window. Loud enough I could hear it over the radio and hum of the duratac tires. Because the leading edge of the cap is cupped and sits slightly higher than the sloping third brake valence I think it creates weird turbulence behind the rear window. Didn't seem as bad with wind at my back.
If I leaned my head towards the back seat and turned the radio off it definitely sounds like constant wind noise. Never had that on my other leer caps. Don't think there is any way to remedy it either. Probably pretty annoying if you had an adult sitting in the back seat.
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