Revised piston rings on 1M

06-01-2011, 08:36 AM	#1
MDORPHN Colonel 292 Rep 2,898 Posts Drives: AW 1M Join Date: Oct 2010 Location: Wash, DC iTrader: (0)	Revised piston rings on 1M Any informed speculation as to why the N54 in the 1M was fit with different piston rings? Might it be to reduce blow-by (and the resultant build up of gunk on the intake valves)? Also, have we confirmed that the revised rings are also being fit in the N54s being installed in the 335is and Z4? Neil
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