Originally Posted by atr_hugo
Mike - I take it you got that from one of your reliable sources? ; -)
Related to me by a dealer employee that will go un-named and was in a recent meeting where a BMW NA engineer warned that these changes were coming. Specifically, BMW was tired of doing warranty work on highly modified cars that damage a turbo, tranny, halfshaft or other driveline component. Southern California was noted as a particular problem area and Dinan was also mentioned as one of the tuners no longer in favor.
This can still be classified as informed speculation, but I am certainly taking it as a word to the wise.