BMW M3 and BMW M4 Forum - View Single Post - How to pass emissions with catless downpipes

marauder1 · 03-08-2021, 09:15 AM

you won't have a problem if you remove the cats on the mid pipe. The engine doesn't even know those exist. So no chance of a code being thrown.

03-08-2021, 09:15 AM	#57
marauder1 Private First Class 38 Rep 116 Posts Drives: Bmw F80 CZP, E92 M3 Join Date: Feb 2021 Location: Virginia iTrader: (0)	you won't have a problem if you remove the cats on the mid pipe. The engine doesn't even know those exist. So no chance of a code being thrown.
	Appreciate 1 PhatLyfe985.00 Quote