This question is for those who have a pacesetter header and modified it to put the sensor in direct contact with the exhaust. When i modified mine I just welded a nut in the center of the Y collector where I cut the long tube off and that lets the sensor screw right into it. Did anyone else do it differently? Can the sensor I use be one labled as universal? The one I have now is universal and I dont think its sending the correct signal to the ECU and I get horrible gas mileage and my exhaust smells very rich.