I have read on here (just can't find it now) that stage 2 takes a few sensors out of the loop and does not monitor them at all. I am just wondering which ones. Reason being is I am wondering if I can just remove the o2 sensor near the cat and use that bung for my wideband and just zip tie the other to the frame or something. I am going to be purchasing a new downpipe soon and once I get it am going to have the extra bung welded in but that won't be for a couple of weeks more than likely. I just don't want it to throw any codes or anything.