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Noise can be a surrogate parameter for turbulent drag. Turbulence is noisy.
Much lower noise was how I knew I wason the right track with my bed cover. That funky-looking thing I have is very quiet. An open bed roars at you.
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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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