I have a 96 accord LX and i got a new header for it but the only thing is the exhaust system has 2 O2 sensors on it. One in the cat. and the other in the origional header. The new header i have has only one O2 sensor hole in it and that hole is near the cat not up towards the manifold. If you have an answer to this please help i am new to the import modification thing and not to sure on how it all works yet. I mainly work on old muscle cars that don't have all this electrical stuff on it.