REAR WINDOW SPOILER

Don't know why people are posting this stuff on hood scoops and hood design because the post is on rear window louvers, not hood scoops. Plus, any opening in the hood in the front or the back is not very good for air intake unless it is a few inches above the hood like the AR Cuda hood. Because when air is moving across the hood it creates a vacuum or low air pressure and will suck the air out of it. This is how the wing on airplanes works by lift, not the air under the wing pushing up on it.