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iQuiet · 09-19-2017, 06:11 AM

Every downpipe will eventually throw a CEL even stock, as they get older the Cells in the cat eventually become dust and you'll have no cats which will trigger CEL with the O2 sensors.

09-19-2017, 06:11 AM	#4
iQuiet Private First Class 53 Rep 116 Posts Drives: 2017 AW M2 Join Date: Jul 2016 Location: Melbourne iTrader: (0)	Every downpipe will eventually throw a CEL even stock, as they get older the Cells in the cat eventually become dust and you'll have no cats which will trigger CEL with the O2 sensors.
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