Thank goodness for the Dinan V2 tune for 230i's. Everything you want in a tune that delivers very smooth engine and tranny operation. A stage 1 tune that bumps the HP to a little over 300 bhp. Still, I live in CA and am very limited to what I can do to pass smog, etc. Just another reason to consider moving... and admittedly we aren't talking about a M240i.
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