Clogged exhaust??

neuzpeed · 06-27-2007, 10:36 PM

Ok guys i'm pretty much a novice her at this stuff... but I've noticed my right exhaust tip is a lot dirtier than my left one... which to me is quite odd. Is there a reason to this has anybody else noticed this?

ES BMW · 06-27-2007, 11:06 PM

It's probably because the flap is closed on the left side some of the time, especially durring a cold start before the Cats start working. I did the flapper mod and now both sides are equally dirty.

McLuVan · 01-22-2008, 09:58 PM

its the flap thing....
u can do a golf tee mod to open both sides
but i think one is closed to get the cats hot quicker
but it opens up later when u speed up
someone correct me if im wrong

06-27-2007, 10:36 PM	#1
neuzpeed Captain 70 Rep 788 Posts Drives: MW BMW M4 2015 Join Date: Mar 2007 Location: Sacramento, CA iTrader: (4)	Clogged exhaust?? Ok guys i'm pretty much a novice her at this stuff... but I've noticed my right exhaust tip is a lot dirtier than my left one... which to me is quite odd. Is there a reason to this has anybody else noticed this?
	Appreciate 0 Tweet Quote

06-27-2007, 11:06 PM	#2
ES BMW Captain 68 Rep 883 Posts Drives: '12 E92 M3 ZCP 6MT Join Date: May 2007 Location: South Florida iTrader: (3)	It's probably because the flap is closed on the left side some of the time, especially durring a cold start before the Cats start working. I did the flapper mod and now both sides are equally dirty. __________________ '12 E92 M3 \| 6MT \| ZCP
	Appreciate 0 Quote

01-22-2008, 09:58 PM	#3
McLuVan Lieutenant General 304 Rep 13,114 Posts Drives: ///M3 Join Date: Jan 2008 Location: Socal~818~ iTrader: (1)	its the flap thing.... u can do a golf tee mod to open both sides but i think one is closed to get the cats hot quicker but it opens up later when u speed up someone correct me if im wrong
	Appreciate 0 Quote