2007 is the end of diesel performance as we know it. Particulate Filters and such are tied in to the ECM through all sorts of sensors. For example, the new 6.7 liter Cummins will have over 10,000 ECM parameters. On the Cummins the muffler is removable, but turboback exhaust is a thing of the past. You will not be able to "fool" the ECM with chips, tuners, and other devices of the sort because in short, you will fry the emissions system. If you do remove this equipment, the CEL will be illuminated and there will be no way to shut it off. If they do come up with a tuner, there will be no doubt it will cost big $$$. They would have to have a harness going to every single sensor on the truck. Extra fuel will be injected on the exhaust stroke to keep the Particulate Filter "fired up".



In short, after ULSD motors come out, you will be able to make them loud, but not more powerful