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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > Regional Forums > USA - Great Lakes > F30 320i stock exhaust louder
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      04-14-2020, 10:01 PM   #1
pathocm
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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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      07-10-2020, 08:50 AM   #2
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This could be because in Eco-Pro, the car aims to keep the RPMs lower to save fuel. People with a muffler delete will notice drone at around 2,000RPM and that's what you may be hearing, although I've never noticed it myself.
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