It's been a LOOOONG time since I've even looked at one of these. I found an exploded view/parts list online. There is something called a seal ring. That looks like a large circlip. It appears that you have to remove that from the turbo exhaust housing and then the down pipe will slide out toward the passengers' side. That may or may be accurate since I'm going off of a parts diagram.
Ah so the ring holds it in? How do you get to it though?
EDIT: It looks like it'll be easier to just leave that alone and undo the turbo itself to get it out of the way. It has several o-rings (air inlet, air outlet, oil drain) but those are probably easier to get than a sealing ring.
I sent an email to Russ/typ4 through his website so hopefully he'll be in contact tomorrow.
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