Hi there, i'm new to this forum ans I have a 2010 Hyundai Accent 3doors, manual. As you may have heard of it, there are new "Hyundai Performance (HyPer)" accessories available in Canada. I live in Canada and I bought the cat-back set. Now that I have some more HyPer stuff on it, I would like to get a new exhaust collector and mid-pipe BUT while getting my car on my school's lift, I discovered I had TWO catalytic converters and TWO oxygen sensors! one before the first cat and the other one after the first cat... If I buy a new collector/midpipe and take off my "precat", won't the sensors screw up all my performance?