If your not worried about a decrease in performance get a chrome whale penis and put a big dirty poddy on the end. If you want some extra street cred you can put a 'link' ecu sticker on the whale penis, even though you probably don't have one. You will get the cool sound your after. Please keep the factory air box for a future owner who wants to swap it out or when you realize it is stupid.
In most cases you cannot beat the factory intake setup. Just put a new air filter in the factory box. I did recently and definitely noticed an increase in power, also got some induction noise at high rpm. You cannot hear the induction noise outside the car when revving up to 4000 rpm between speed bumps on the main street but that doesn't matter because I don't intend on looking like a ****** and all those school aged car sl*ts are too young for me now.