Man am i glad i live in canada. All we have to do here is De-tune the car, throw on some catalitic converters and go through smog testing. After smog testing, take out the cats, set the tune back to original, and your done. if a cop stops you, he will probably check for cats, see there not there and give you a VI(Vehicle inspection). All you do is throw the cats back on, pass the VI and then take them out again.