well if your just looking for sound just remove the stock air box and put a cone filter on the end(what they call a ricer intake)...we did it to my friends srt and it sounded pretty loud and like said above it made it sound like it had a louder than stock bov. cold air or short ram i dont think would make a difference because of it going through the hot ass turbo like CobraSpdRH said.i think you need something with more air volume for the turbo to suck in so just see what has the biggest diamater tubing. to me its not worth wasting the money on it....the cold air ones are prety expensive just go and buy a used nitrous kit or something. but i will agree that a after market intake does make it easier to work under the hood, it simplifies things in the mess of vac. lines and whatever else is in the way.