I am having problems with my 02 sensors going bad after i installed my bbk LT headers. I do have the extensions in and i have talked to others that are using them and they do not cause them any troubles. The CE codes i am getting are p2197 with is the upstream sensor stuck lean. I have the NTK wide band sensors installed right now. I have check for leaks several times and nothing is leaking so what could cause the sensor to keep going bad i have replaced them several times and the code goes away for a little while then it comes back