I believe the 330i (N52B30) and 325i (N52B25) use MSV70 while N52N uses MSV80/MSV80.1. And then the N51 uses MSV80.1
Obviously correct me if I'm wrong. This is a good question for Hassmachine
If I were you, I'd just try to hunt down a 330i motor assuming it'll work natively with the 325i MSV70. You'll probably need a 330i-esque tune, but that's in the works.
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