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greg135is · 11-18-2013, 11:14 AM

Has anyone experienced this after installing a berk muffler delete or any other hi-flow muffler?? Was wondering because I read some info that said hi-flow exhaust alters engine timing and other engine characteristics.

11-18-2013, 11:14 AM	#1
greg135is Second Lieutenant 13 Rep 266 Posts Drives: 2013 135i Join Date: Jul 2013 Location: sfv iTrader: (1)	Exhaust & engine running lean Has anyone experienced this after installing a berk muffler delete or any other hi-flow muffler?? Was wondering because I read some info that said hi-flow exhaust alters engine timing and other engine characteristics.
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