Quote:
Originally Posted by Metal*07*328i*Head
your right, but i have a 328 so i would need an x3 si manifold, i dont think i could use a 330
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I'd cross-reference the part numbers. There's a pretty good chance that the manifold is still the same, or almost the same. The 328 still uses the same cylinder head, which would mean the intake ports should have the same bolt pattern. Check the intake manifold gasket part numbers too. Even if the IM is slightly different, it could still fit.
EDIT: I just checked for you guys. The part numbers are the same, the E90 330i, X3 3.0si, and the Z4 3.0si all have the same intake manifold. So that should open up a lot more options for people trying to track one down.