I've used Bavarian Performance Group in Winchester, MA. They specialize in BMWs and M series in particular. They did quite a bit of work on my E46 and I intend to use them with my new E92.
http://bavarianperformancegroup.com/
Steve
Last edited by Wolf-e92; 11-04-2008 at 09:12 AM.
Reason: Recently moved to Winchester from Stoneham
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