Is oxygen sensor in my 03 se located on the stock y-pipe? I fi purchase an after market y-pipe (ie. cattman or WSP), how do they deal with the sensor? do they provide a port for it? or do they just ignore the original oxygen sensor and worry about it yourself?

 

Usually the Y-pipes have the bungs welded in for the O2 sensors. I would wait on the Y though because the 2k2-2k3's that have them have shown only small gains (a few horse).