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I think they might be talking about being the only folks who can map a MSD81 ECU'd car via ODB.
So far as "detectablity" goes - obviously, they can just drive it ;-) but as far as I understand it, a dealership does not have the capability to read the engine mapping file from an ECU - it would have to go back to Germany for that.
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2019+ BSM M2C 2011-2012: VO 1M Coupe, many toys, Evolve Stage 3. 2008-2011: 135i M Sport Le Mans Blue / Lemon / HGSL. Evolve OBD remap - 390bhp. Also in the family: X3 M40d / Audi S4 (V8)
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