I currently have a 05 rocky mountain KJ with 225,000. It has California emissions converters and one is clogged. I live in TN where we have no emissions standards so I would like to go to the lesser expensive cats. If I do, will the check engine light remain on if I do so? I've considered straight piping with the mini converter set up in the downstream 02 port spacing it away from the stream. Has anyone ever done this with success? My concern is that I want the check engine light off and want to know if its possible with a standard converter or mini converter.