FI is hard to come by for the 3.0 I6. BMW's are notorious for very small performance gains for the dollar. Usually takes thousands to get a NA Bimmer up to speed, as opposed to "American" engines. There are a couple DINAN FI options for the V8's. Maybe a custom kit could be a road to look for. Start looking for FI kits for the 330 and such, maybe there is some custom work that could be done.

Nitrous is always a way to go for quick speed.

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