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I got mike's tune last week, and the car feels great. The servotronic and the cold start changes are the most immediately noticeable. Butt dyno says the car feels a bit quicker, but, you know how much the butt dyno is worth. The M3 is already a quick car and I don't really drive hard, so for me, I feel that the servotronic tuning (now and down the road) was worth the $1k alone.
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