Quote Originally Posted by nsany(atl)
did it throw codes with the cat? b/c Audi's normally flip out when you change the cats from the factory ones
I ran catless on a 1.8T for 3 years without any serious codes. It would pop up occasionally with the catalyst below threshold, but it usually went away after a day or so. Its a dub, if you dont have a CEL you need more mods