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      03-16-2019, 10:09 AM   #8
largebaboon
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Drives: G30 540i | F10 535i
Join Date: Jun 2017
Location: CA

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I haven't measured the 540i yet but subjectively the 530i is definitely quieter. However, I suspect because my 530i is using 18" wheels, whereas the 540i is using the 20" m-sport wheels with the super thin tires.
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