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      11-01-2012, 08:30 AM   #6
PeterM
Private First Class
 
Drives: bmw 335i
Join Date: Oct 2012
Location: United States

Posts: 174
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I was thinking of getting a stock downpipe off ebay and hallowing out the cat part. Stock downpipe looks plenty big then i wouldn't really have to worry about warranty void as it will look factory. But then you gotta figure out a way to keep the CEL off, Have you guys tried a spacer on the rear O2 sensor or it doesn't work on the BMW's
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2013 EB2 335i 6MT
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