there should be a sticky thread on top of this forum saying "everything you need to know about air intakes"
you open it and sand down the little fins inside, remove the J shaped piping and put in a K&N filter
Go here: http://forums.vwvortex.com/zerothread?id=666711
Stock Box w/ stock filter, smoothed inners = 172 g/s
Stock Box w/ stock filter, smoothed inners, ram hose = 177 g/s
EVO CAI = 178 g/s
Stock Box w/ ITG, smoothed inners, ram hose = 184 g/s
NOTE: Although you never hear about it here, in the original thread I linked to above you have to pay out of your rear to get top quality (no ridges) big diameter tubing. And the filter is not a K&N, it's ITG, which also costs an arm and a leg.
If you're doing it to save money, don't bother, because if you plan on doing it right, it'll cost about the same, plus alot more work.
read this, http://www.bolhuijo.com/airflowtest/ , I'm not so sure about the ITG filter. It tested #4 out of 5 in this test. At the bottom of the page under links, click on "larger photos" and read the captions under the filter pics.
Stock box shaved, with stock filter, & ram hose seems to be the ideal http://****************.com/smile/emthup.gif
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