I have Dinan Stage 3 on my 135is, but I'm currently pursuing a stock 1M. My experience with that tune on the 135 is that it's a freaking beast. It's nearly impossible to put all that power to use on the 135 platform due to the open diff.
Did the DS3 tune on your 1M have the same "wow!" effect?
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1M. Previously: '13 135is; '07 E90 335i; '02 325i; '99 Z3; '98 328is; '87 L6; '77 320i
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