I was hoping someone would be able to help me out. :grovel: I need to know what the thread size and pitch is for the rear most O2 sensor. :dunno: I don't think I am going to have to mess with the front most sensor, but if I have to, is that the same size? I am going to be welding a nut to thread the sensor into to make my job look as professional as I can. :wink: Thank you in advance for your help.