N54 02 Sensor Simulator This is an adjustable O2 simulator that will allow the factory computer to operate without tripping oxygen sensor related fault codes. This will allow you to continue tuning the engine for maximum power.
Regular LSU 4.9 recommended operating range is below 930c. ADV LSU 4.9 is below 980c for the pre-turbo version. No need to alter placement just because you're switching to the ADV, unless of course you're burning through O2s, then the exhaust temperature is too hot and it needs moved back.