Your right, there is A LOT of information out there, can be hard to get your head around it all...
here's what I used:
So just to break down:
1 x ebay cooler (2.5"/63mm depth and outlets)
5 x 90 silicone bends
2 x 90 ally bends
1 x 45 ally bend
1 x 45 silicon bend
1 x reducer coming off the turbo (think it's 2.25" - 2.5")
3 x alloy couplers
1 x alloy t-piece (for the DV take) and some way of plumbing in the DV
1 x silicone IC to TB hose (the 2.5" pipe work wont fit in the standard one)
Or some sort of combination of the above depending on how you decide to do it, there are of course other ways!.. You'll also need something to plumb the N75 into, I used a brass connector that I tapped into the DV take and then sealed with chemical metal.
If your engine is AUM (which it should be) you will also need to include a map sensor pipe in there some where. Unfortunately forge appear to be the only people to do them so look forward to getting your wallet out for that!
Think that's about it bud, more pictures of mine on page 3 of my "build" thread:
http://www.audi-sport.net/vb/a3-s3-...-frenchmans-a3-daily-track-all-rounder-3.html
I didn't want to loose my fogs so removed the air-con condenser so I could sit it back a bit. If you don't do that your likely to loose fogs and have to trim the crash bar but will save you a fair bit of hassle I'd imagine.
Hope that helps mate, let us know how you get on... Good luck! :thumbsup: