I would recommending hitting up the German forums with a little bit of google translate you might get a good answer. I don't know any indy shops in stuttgart that work on BMW's but I guess you could ask steven over at speed-concept.de and see if he can point you in the right direction.
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Ohlins R&T 1m setup, m3 rear links, M3 arms, bushings, AR Downpipes, ARK DTS exhaust, SPEC S3+/Mfactory, Stett CP, Stett CAI, ETS FMIC, RB EVO Stealths, Motiv PI, VTT Inlets.
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