Be sure to check your local laws for this. In many states, anything on the windshield is illegal. I've been pulled over for this with a windshield banner applied by the factory.
2014 Mustang GT Premium: Ruby Red, GT500 exhaust/valance/spoiler and Roush Upper/Lower grills and splitters
1987 Camaro IROC-Z: 350, TTops, Leather, Bose and only 20k original miles