Mid-Pipe question

[amair001]

Im wanting to get either the cat-less mid pipe from protege garage or from SLS. I was wondering if our stock cat has a o2 sensor in it? And will the car throw a cel code If i go to cat-less?

 

[MP3Performance]

Our cars only have 2 o2 sensors. One in the first cat (the one in the header) and one right after it. Replacing your mid pipe should not trigger a cel since you are replacing the second cat that is already behind the 2 sensors. You would trigger a cell if you replace the first cat with a performance header. But you can make a o2 sensor adapter and not have a cel.