Diesel Particulate Filter (DPF)
The DPF on the 6.4 powerstroke is a filter that catches all of the soot that the engine makes. The filter can cause problems if it gets to clogged up, if this happens you may be prompted to pull over immediately. There are ways to clean these filters out or you can delete it although that is illegal, this is America so what you do is your own business as far as I am concerned. For any questions give me a call at (678) 920-1187.