From what I've been told, a mk3 downpipe will not fit correctly on a mk2. I believe it hangs too low. I don't think that's a "full" 3" downpipe either. From the looks of that pic, the top and flex section is like 2.5" then expands to 3".
The orientation of the DP on the cat is way different to our MK2 and the flange is a different size to the MK3... try to ask Aaron Garney if he is selling a DP for the MK2 from his turbo kit.... its worth a try