I have to ask... Sure, my truck smoke at WOT. It makes decent power and thus smoke to go with it. However, I don't get why people want to smoke on purpose. To leave a cloud of smoke while just part throttle, smoke while idling, etc. Sure, if I race its funny to smoke em literally, but that is part of racing. However, if I could make the same power without smoke, I'd do it. I see why Banks says they make power without smoke opacity I think is what they call it. I'm by no means a green peace buba at all, no cat, no muff, etc. So, what is it with just wanting to smoke like a freight train? Diesels get a bad rap already with smoke and pollutants. Why try to make more? Just want to know, not asking just to be an ass.