Extra parts needed when swapping a S5x into a E30 M3 ?

[LINUS]

I'm doing the swap to a S52 and I've heard that my brake booster is too big and my radiator too small - that's what I've been told so far. Anyone here want to list out what all needs modification / replacement when doing the 6 cylinder swap (aside from the basic E30 items) ?

Coolant bottle looks like it needs to move - anyone verify that too?

Thanks.

---Ben

[Addissimo]

probably need a 6cyl radiator, go with the 88+ coolant resivoir for a 325, brake booster will need to be swapped with either an ix booster, or a modified 320i or 2002 booster. I'd recommend the ix booster because the 320i isnt quite enough power assist. You also have to change some kind of wiring in your dash cluster to get your tach to work with the 6 cylinder signal.

otherwise everything is discussed in the 42+ page thread at the top of this subforum.

-Addis