Originally Posted by TRY...M3
I have an agency power exhaust with agency power mid pipes...the O2 extenders are also made by agency power. They were installed on the secondary cats as instructed and after about 5 miles of driving it jumped right into limp mode. And once we took them out everything went back to normal I just received the CEL.
Dude, it was the install.
There are plenty of people who have no cats and run around with a check engine light and don't go into limp. There have also been many who run the Fabspeed and there have been no complaints since they came out with the extenders. So for you to come out and talk like it's the norm to have limp mode is totally inappropriate.
It's cool to give your experience but with an explanation- which others had to drag out of you.