Bob it depends on what you are looking for. Stage 6 does a ton of custom work, Mase engineering has developed a tune and they can install most anything you need plus they have a dyno but the guy said it reads low. Mase also tunes some of the cars running in the Rolex 24. Other than that I don't know of any other BMW shops in the area. If you get any performance parts and need help installing them I'll give you a hand. I'm in the fruit cove area.
"Never attribute to malice that which is adequately explained by stupidity."