BMW M3 and BMW M4 Forum - View Single Post - Catless Downpipes and a CEL...What's the Verdict?

Mandi90TT · 08-16-2014, 02:04 AM

So, now that a number of catless downpipes have been on the market, what's the verdict? Are they causing the ECU to throw a CEL, or no?

08-16-2014, 02:04 AM	#1
Mandi90TT Colonel 2712 Rep 2,371 Posts Drives: BSM 6MT M4 F82 Join Date: Aug 2014 Location: Colorado Springs iTrader: (0)	Catless Downpipes and a CEL...What's the Verdict? So, now that a number of catless downpipes have been on the market, what's the verdict? Are they causing the ECU to throw a CEL, or no?
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