I wouldn't worry since that piece does nothing for the aerodynamics. You'd be better off with a venetian blind inside the glass. The reason it works on the Delorean is there is a vertical backlight, so it turns a notchback into a fastback, sort of...
![](http://deloreaninfo.com/wp-content/uploads/2012/03/delorean_67301-1024x682.jpg)