BMW 3-Series (E90 E92) Forum - View Single Post - N55 Rough Idle W/ catless dp after JB4 ISO?

SFGiants · 01-31-2013, 08:46 PM

had this problem too with jb4 and downpipe. went back to stock because i couldn't deal with it anymore. good luck with it.

01-31-2013, 08:46 PM	#5
SFGiants Private 9 Rep 82 Posts Drives: e90 335i n55 Join Date: Sep 2011 Location: North NJ iTrader: (1)	had this problem too with jb4 and downpipe. went back to stock because i couldn't deal with it anymore. good luck with it.
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