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sunny · 09-24-2021, 04:40 AM

You can also expect drone noise at highway speed.

I used to have 340i with BMW Performance muffler from factory(maybe this is MPPK).
And every time I cruised 75 to 80mph there was a drone noise in comfort or sport.
I used to step down a gear or turn radio a little louder.
loved everything else about it.

09-24-2021, 04:40 AM	#7
sunny Lieutenant 44 Rep 472 Posts Drives: E92 M3, e90 330i Join Date: May 2008 Location: central CA iTrader: (1)	You can also expect drone noise at highway speed. I used to have 340i with BMW Performance muffler from factory(maybe this is MPPK). And every time I cruised 75 to 80mph there was a drone noise in comfort or sport. I used to step down a gear or turn radio a little louder. loved everything else about it. Last edited by sunny; 09-24-2021 at 12:24 PM.. Reason: update.
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