bms jb4 for 2020 440i xdrive

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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > bms jb4 for 2020 440i xdrive

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10-15-2020, 06:57 PM	#1
Saber_Artori Registered 0 Rep 4 Posts Drives: 2020 440i xdrive coupe Join Date: Oct 2020 Location: New York iTrader: (0)	bms jb4 for 2020 440i xdrive How much does the jb4 map3 tune affect mpg?
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10-16-2020, 12:19 AM	#2
435gc Lieutenant 174 Rep 461 Posts Drives: 2015 435i Gran Coupe xdrive Join Date: May 2019 Location: Charlotte iTrader: (0)	The only thing it will change for mpg will be your heavier right foot. It will only operate when you get into boost.
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