The people whose trucks smoke allot are the ones that get noticed that's for sure its noticed by everyone including the epa.having a friend that works there says allot of their research is done on the internet youtube and such and they see how much smoke can be generated from these trucks.im saying that we have drawn the wrong attention and now we are paying for it by the latest crackdown. There are those of us that bought tuners to make the truck run like it should not create tons of smoke to waste fuel and impress people. I love diesels I think now we are paying for negligence.