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the MAP sensor is just a MAP sensor. the IAT is built into the MAF. If you get a euro IAT, it replaces the MAF.
it looks like several people have downloaded it but I haven't had any feedback. I think it will work fine (keeping in mind it will not past an OBD2 emissions test).
You should be able to test it with your factory MAF, it will just ignore the sensor reading. If there's some major problem, just go back to the original 328i-330i tune, it only takes 40 seconds to flash anyway.
Also I don't recommend a no-MAF tune if you have headers. At least not until the feedback loop gets sorted for the different O2 sensor position.
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