Hey Guys, I'm moving to Washington State from Indiana, and unfortunately it looks like my Cat and EGR free car is going to soon have to pass an emissions test. I hear that they only do an OBD2 check in which case I only need to tune out the exhaust codes? So my question is, which ones need to go? I might still slap a high flow cat on the car since I don't want to turn any heads with the exhaust smell that comes from my car.