Oh, Sorry, I meant to respond the other night, this is a photo shop add on, meant to make one using the T-Vargo (Kitteh) method of construction styrene foam but never did. I reasoned that the air is definitely not attached starting at the top of my back glass, I can tell when it rains, there is no air flow on it. I figured to make this and follow the lines on my trunk on the sides, and it would resemble the shape of the new Honda CR-Z, a little. I figured it would net me 5-7% MPG boost. I was going to make it so I could get it on & off relatively easily and only use it on my cross county highway trips which I make 3-4 times a year. It is just under the template curve by like 2".