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pathocm · 04-14-2020, 10:01 PM

F30 320i stock exhaust louder
Have anyone here tried to drive in Eco Pro with DS mode pls? i notice that the exhaust or engine sound much louder. may i ask the technical theory behind?

04-14-2020, 10:01 PM	#1
pathocm Registered 0 Rep 4 Posts Drives: bmw f30 Join Date: Apr 2020 Location: China iTrader: (0)	F30 320i stock exhaust louder F30 320i stock exhaust louder Have anyone here tried to drive in Eco Pro with DS mode pls? i notice that the exhaust or engine sound much louder. may i ask the technical theory behind?
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