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      05-04-2012, 04:26 PM   #7
eyim1988
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Drives: 2013 335i M Sport
Join Date: Feb 2011
Location: Los Angeles, CA

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And op. it's probably normal. I know some 135 guys are having idling issues where car stalls and revs go up and down on idle after Installing a Catless downpipe
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Current: 2016 bmw m3
Past: 2013 bmw 335i, 2011 bmw 335i coupe