In NY the Dept of Environmental Protection will and can pull you over on the side of the road and do a particulate test right there on the spot if the officer fells that you are blowing to much black smoke on acceleration. I know this for a fact because I had it happen to me with the Semi I was driving. It failed the test and the company had 30 days to fix the problem, and was still fined $700. So all of your with these tuners that crank up the fuel to the motor a word of warning, it won't be long till all the states EPA start this.