It the time of year again where i gotta register and smog it. The last time i smogged it was like 2 year ago where my car was complete stock. the mileage back then on the engine was around 155,000. Now it has almost close to 170,000 mile on it. well my question is, if u add a cold air intake and a cat-back exhaust, would it affect the smog that coming out of my car? would u expect me to pass the smog test with these modification or would i have to put on my stock intake and exhaust in order to pass it? i drive a 94 LS by the way.