I have no drone on my 330i with my Dinan exhaust and Bimmian/Simota CF Intake. I gues its a little one at 2 but its not loud at all. Then again I have a 330i and you have a 335i. Sorry for the waste of a post but maybe it will help another 325/328/330 owner
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2010 AW e90 328i: 6 speed, Black Leather, Dark Wood trim, ZPP, ZCW, ZVP,ZSP, Nav, Xenon
BMW Performance CF Rear spolier and Gloss black grills
2008 Candy White MKV GTI 2.0T 6 Speed Manul Gone
2008 AW X3 3.0si: 6 speed Returned
2006 AW e90 330i: 6 speed Dinan Stage 1 Returned
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