I need to replace my Y Pipe, and instead of going stock, I was thinking it might be a good time to try an aftermarket part, was thinking about getting a WarpSpeed Y Pipe SS, I have I think a Cali Spec Max, and was wondering what type of O2 issues I would have with a Y Pipe, and how does a O2 replicator or whatever works? I just don't want to have any check engine light issues and have to spend extra money in order to pass inspection. Thanks for any replies!