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.
Modified by -Khaos- at 9:13 PM 11-25-2006