So I bought an E30.

[Beej]

If you're looking at full headers, make sure someone has used them on a swapped car before - they're gonna be close to the control arm bushing bracket.

Well, I don't have any downpipes, so I'm looking at either fabbing up new ones to get to the rest of the exhaust, or buy a set of pretty Stainless Steel headers with downpipes already there.

Anyway, here are the two headers I'm looking at:
I'd prefer these if they'll fit -- Nice long primaries, mandrel bent and TIG welded. $250 shipped.

Did some searching on r3v and got mixed results. One guy said he had to stack 4 washers on his passenger side motor mount to get them to not hit the subframe, and even after that, they hung low. I'm going to seriously consider them though. I think they're too low for my car, but it might be worth cutting the ends off them and welding on new, higher downpipes. Stole this pic: