Since I just got my WRX, I asked my buddy what kind of exhaust he has, and he has been catless for the last 5 years and always passed emissions. His friend put in the "O2 Sensor defeat" for him but his buddy is no longer in state so I couldn't have him do it. Anyone done this before and care to post a link or a write up on how to? I myself am not the best with wiring but I have a friend who is. Thx ahead of time