Hood scoops! Do 'em right and your car looks like a furious, forced induction-having ass-kicking machine. Do 'em wrong and it makes the car absolutely absurd.
Like I said in my design analysis of the Subaru WRX Concept the other day, I'm a big fan of the way the designers integrated the 'Rex's famous scoop into the hood on that car. I really hope it carries over to the production version because it looks sleek, sexy and functional.