I was wundering which resistor I need to use to trick the ecu in thinking everything is ok and stop throwing a code from my 2nd O2 sence i have a high flow cat?

 

Bump, I would like to know this also.

 

there is no resistor trick for that, I wish it was that easy. you should be able to weld and 02 bung on the test pipe and only have the tip of the o2 sensor barely in the pipe. you will probably have to take 2 bungs and weld them together to get the sensor backed out of the pipe enough.