We had noticed quite a bit of a difference on cooler days with our WindRestrictor. I put the side windows up all but about 2” and the air flows straight thru and out back side, the air doesn’t wrap around back into the center of car near as much, I also like the 3rd brake light feature. When I first ordered mine I got just the LED in the mcolor blue, but later purchased the 7 multi color lights which comes with a small handheld remote control to do adjustments to the colors and movement to the color operations at car shows. I can now run the red color, same as the brake lights while driving. I agree if it was higher it would help more, but there is only about an inch clearance now with the top up. It also seems that would be a bit of pain to remove, especially if you was out Cruz’in Topless a storm or shower came up quickly! Until you get the WindRestrictor plate disassembled you and inside of the car would be soaked! I do really like mine!
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