what you got behind the turbo???? all depends. your car won't get the sniffer in PA anymore. with the changed emmision laws all the newer cars are getting the computer test. they plug into the port under your dash and basically the car tells them if you're running clean or not.

i'm running a godspeed DP which has that little bung that comes off it, that little magical bung has a very small cat in it....the sensor is bolted in right there...sooooooooo.....the car reads the air (through the tiny cat) and the computer says everything is just fine. then it tells the computer that the car is running clean.....so swapping out exhausts for inspection anymore yehaw!!!

like i said...it all depends on what you're running and how the computer reads it.