Originally Posted by hopelessbrand
So if you have say a MAK or MBRP or AFE catted y-pipe...it would be ok to run the Kooks setting?
No the Kooks setting only works for the kooks downpipe. Kooks uses the green cats which are the only cats that are guaranteed to not trigger a CEL, the kooks setting does not have the rear o2s disabled. I have had a few customers test that setting before loading their custom tune, and have all had their CEL turn on.