Yep, Eliminator series is designed to bolt up to stock manifold etc., anything else needs it's own manifold, downpipe, intake etc.
Your link points to the Audi kits, you need to look here:
http://www.atpturbo.com/root/releases/release090105.htm
I have had a hands-on look at the GT2X and GTRS Eliminator turbos, all Garrett turbos, cracking turbos, even the GT2X is bigger than a K04, here's a couple of pics I got of the GT2X Vs K04:
GTRS and GT2X are being fitted by Star as we speak, the GTRS is a good chunk bigger than the GT2X again, mine is going in very soon!