Ok I just installed my pacesetter header and it has 2 different fittinngs one on the header and one on the down pipe for the o2 sensor I don't want to put the o2 sensor in the down pipe cause I would have to splice the wires and make them longer to connect to the plug in the fitting on the header were the o2 sensor fits is bigger than the o2 sensor where and what kind of reducer or whatever can I get to screw into the header that I can screw my o2 sensor in any ideas ???????

 

I've seen inserts that look like short bolts with threads inside, some sort of threaded insert. Forget where I've seen them before, though.

 

U think lowes or somewhere like that would have them not sure about an auto parts place having them

 

They should. Maybe inthe pipe section, with their black and galvanized fittings. I think that's where I saw the ones I'm thinking of.

Or maybe try an exhaust shop like Midas or something.