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Had this installed on Thursday, really disappointed. I think my car actually lost power. Falls on it's face at 5k RPM. Took it back to the dealer yesterday and they confirmed something isn't right. Test drove a 328Xi with the tune and it definitely had a lot more go. Anything we should be looking for? Maybe a faulty box?
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2011 E91
2016 M2 - Sold
2014 X1 - Sold
2002 Land Rover Discovery II - 3" lift & 33s
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