Racekraft325IS
06-17-2007, 11:14 PM
I know that this is in here somewhere but can you put a E36 M3 head on a E36325IS engine and if so how much HP gain?
E36LUVA
06-18-2007, 09:08 AM
That all depends on whether its an OBD1 M3 (S50) or an OBD2 M3 (S52). Your 325IS is OBD1 M50. But there are ways to adapt the S52 head to the M50 block just do a search on here there is shit load of info on these boards. There isn't much difference in heads between all the six cylinder motors, 2.5, 2.8, 3.0, 3.2, just the cams and maybe valve springs. Just put any M3 cams into your existing head and call it a day man.
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