Rote8

Anyone running the Mazsport (CAT less/Dual resonators) midpipe?
Do you get CELs?

snipaz2420

there is a rather large thread on this but yes you will get cel because there is not cat converter

mysql

The car has a sensor before and after the cat. If there is no cat the readings will be the same and it will set off a CEL since clearly the cat isn't functioning.

However, many of us with turbos and no cats do not get any CEL for missing cat. No idea why. Maybe the same will be true for you.

Regardless, if you get the cobb accessport you can delete any CEL you don't want, so ultimately it no longer matters if something produces a CEL.