01-12-2022, 04:08 PM | #1 |
drive to survive
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exhaust upshift growl..
When I hear some other bmw speed pass me and the car upshifts I hear a small growl almost like it has a BOV but I know our cars doesn't use BOV.
Is the sound coming from the aftermarket exhaust or the down pipe change? |
01-12-2022, 05:26 PM | #2 |
Second Lieutenant
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intakes and downpipe make noises more noticeable. i get them from my resonator delete
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01-12-2022, 06:58 PM | #3 |
Captain
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Drives: 2019 M550i
Join Date: Aug 2018
Location: Tampa Bay
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Just engine overrun
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