Quote Originally Posted by DrGonzo View Post
My concern is the shape of the underside. that unfinished/concave underside will play havoc with the air passing under it and I don't think I'd trust it at high speeds. it really needs to be a smooth flat surface. Those downward rolled edges on the underside would generate lift and drag. Probably to the point at high speeds it would tear them right off of the self taping screws. That is all assumption though based off of the underside shape.

Once I saw the shape of the underside I lost interesting these. With the "unfinished/concave underside" it will play havoc with the air passing underneath the car. These provide no function at all, only looks.