The 550GT does not have twin scroll turbo chargers....not part of the N63tu update.
Originally Posted by Stealth.Pilot
I think there could be one of 2 explanations:
1) the 550i engine is identical but detuned.
2) the 550i does not have twin scroll turbo chargers.
2013 F10 550i M-Sport | Space Gray | ZMP | ZEC | 6-speed | Dinan Stage 3 Tune | Dinan Exhaust | ACS Springs | 35% Ceramic Tint