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      01-29-2013, 12:52 AM   #12
HighandDry
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Drives: E92 M3
Join Date: Jan 2013
Location: Seattle

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Personally, I would go with a company that has a proven record with BMW.

Evolution is well known for Porsches, but not so much for BMW.

I had Evolution do a tune on my Ferrari. There were a lot of issues with the tune and I ended up taking it off. They did refund the money, but I was still out 600 bucks for the time for the mechanic to install/take off the tune.

In the Ferrari, they had to remove the ECU's from the car, which is a big expense and pain to do. I'm pretty sure they don't do any of their tunes via the OBD.