Guys, i was looking at possibly modifying the whole exhaust system (crawford High Flow Cats, stillen headers, stillen dual exhaust), but i don't want to get in trouble with emissions in canada, or in BC (where i am), failing AirCare. Does anyone have more info on this risk?

 

The only part of the exhaust you need to worry about emissions is the CATS. As far as I know Crawford guarantees these will pass any emission test in North America. Call them to make sure. BTW, that sounds like a nice set up.