The Could the differences in price and specification be anything to do with quoting for a Euro 4 M3W maybe? Stage 1 kit didn't require an ECU flash as the adaptive maps can cope with it. The same applies for the G56 kit. Both benefit from an unlocked ECU and a rolling road set up though. I would vote for the G56 kit as well because I am a satisfied customer. Performance and running are greatly improved and it's got a deep rumble but is not too loud. If you plan any long journeys you will appreciate that after a few hundred miles.
