Hi guys! Just replaced the CAT with Danmoto link pipe and I also have a short slip-on (SC Project) while keeping the stock headers. Engine runs fine except weird timing just at idle. Once I twist the throttle, is smooth as silk. Question: I'm worried of potential engine damage long term if I don't use a fuel/air manager like the PCV, although as it is I would rather keep the current setting. Anybody better informed on potential engine damage with this setup? Thanks for well-informed (not guessing) answers.