One like i have on mine.
Problem is it was custom made.
But if you want to hear the turbo boost escaping on your Q4 try something like this: http://220.127.116.11/artc/register/artc030/images/08.jpg
If needed i got this picture *much* bigger.
If you are pure into performance it might be a good idea to put a heatshield between the airintake and the enginebay.