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It's kind of like a "nudge bar" or "license plate light bar",
The only way I could see it having any effect is to reduce the size of the pressure infront of the grille by tripping the air into turbulant flow.
I do seriously doubt it has any effect, but does anyone have any data for a similar concept or is everyone just going on accepted theory.
I do need to go check out the unicorns though, they're always cute.
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