I think it's funny how so many threads exist on the worry of Tune / Warranty issue - especially when the signature mods on the OPs are loaded.
Just picture a guy rolling into the dealership with a different exhaust note, $5K wheels, dropped Suspension, under the hood is clearly visible DCI, DP's, FMIC, BOV, fingerprints all over the ECU box etc... and then they're worried dealer might suspect they have a tune...
oh yeah, and their integrated boost gauge still shows the last stored boost reading of 15+.
enough with repetitive inquiries on tunes!!
BMW might have a hidden menu that shows the car has been driven well past the governor limit or went 0-60Mph in 3.5 sec...that would seem fishy to me.