BMS backend flash question
I only have JB4 ISO 25 and running map 5. I live in California and so run 91 octane pump gas. Now that the BMS backend flash is free and they have pump gas versions, do I benefit from flashing or is it better to be running JB4 only?
2008 E90 335i: JB4 G5 ISO | BMS Pump Gas Backend Flash | ER Charge Pipe | n54Tuning DPs | ETS FMIC