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      11-01-2012, 11:30 AM   #10
CombatNinja
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Drives: e91 328i, e90 328i, e90 335i
Join Date: Feb 2011
Location: United States

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The smell is very mild, only noticeable when idling in the garage or sometimes when reversing. Even then it is pretty tame. Worth mentioning because some people have different sensitivities to the smell of gasoline.

I have never experienced any erratic idle with a catless n55 downpipe.