You have to look around. Different intakes will do different things and some that apply to the performance your looking for more. Companies like Injen and K&N just go to their website and they will have a search you can do or a list of authorized dealers.
i dont know thats a good question. It looks as though it was just made for an air intake or something along those lines, because if you look at the bottom of your car there should be a couple of holes in the panel right infront of your tire, and it would seem as though they are there so that...
an injen intake would definitley set you straight. Injen offers their rd/rs intakes which are their high end power intakes. take a look at this link it should be exactley what your thinking about
http://www.injen.com/new_layout/products/engine_images/grp2/RD6060P.jpg