[onewhippedpuppy]

Originally Posted by flipper35

They are and a lot of this problem is people dumping tons into the air because it looks cool in their diesel.

Some of the stuff does make a better engine, but a lot of the stuff is just for brodozer love fests and everyone pays.

I deleted the DPF, cat, and EGR system on my Ford 6.4. These three systems conspire to kill many of these engines prematurely and strangle the power and MPG. With a tow tune I have no black smoke, far more power, a smoother running engine, and get 25% better MPG. Since the early days of government mandated emissions they have simply traded one evil for another, this is no different.