I am trying to decide between getting window louvers or window scoops. I am leaning towards the scoop because I would really like to make my car a Shelby tribute car, however, I'm concerned that the window scoop would have a negative effect on aerodynamics.

I know that the real scoops were used to cool brakes and/or provide ventilation for the car's cabin, but, do the scoops (versus the louvers) act as wind catchers at speed?
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It would not be noticable.... Don't worry.

 

Quarter window scoops redirect air over the spoiler. But these scoops are not designed to be very functional which is easy to see because it doesn't have a very big opening. Any drag would be negligible.

 

yeah what they said. dont worry

 

unless you're going for the top speed record on the boneville salt flats.... it's not even an issue