That 4bar is just a headache. Even when setup perfectly there's still issues, hesitation at part throttle, erratic IAT and boost readings, phantom codes that crop up occasionally no matter what you set it to. Gotta scale it right, disable codes, modify iat voltages, etc. Some cars do OK, but I don't recommend it for anyone ever really. Terry your continual support for them baffles me, I've been approached by people with jb4 looking for help after asking you and David and ultimately I talk them into a N20 and whatever problems go away. Do you have like a massive inventory you need to move or something? Real question... That sensor is crap man. I'm a GM guy, but my faith in that thing is zero. I've spent more time trying to run down issues with it than anything else, it's worse than stock O2 issues in ST cars.