BMW M3 and BMW M4 Forum - View Single Post

parky1215 · 09-09-2014, 10:07 AM

Can't really help with drone issue. Even stock exhaust drones (worse if you have catless dp) if you keep exhaust valve open during low rpm.

09-09-2014, 10:07 AM	#9
parky1215 Lieutenant Colonel 573 Rep 1,986 Posts Drives: F90 M5C \| G06 X6 M60i Join Date: Nov 2010 Location: Rancho Cucamonga, CA iTrader: (13)	Can't really help with drone issue. Even stock exhaust drones (worse if you have catless dp) if you keep exhaust valve open during low rpm.
	Appreciate 0 Quote