I want to replace my catalytic converter with a test pipe in order to save the cat. I don't like spending $200 whenever I have to smog the car so I would like to just keep it good until smogtime rolls around. Problem is that I have an O2 sensor after the cat so I don't know if the test pipe is going to mess up the mixture or something like that. Anybody with some experience on this? I'm running headers and would like a complete 2.5" exhaust. Thanks in advance
Jake
Jake