OK, you need to know exactly what the guy is suggesting. First of all it's a violation of federal law. I doubt anyone is looking to bust them on it but you should at least tell them they will be out laws. Also, if you have diesel emmissions or a visual inspection where you live you will not pass with the DPF deleted.

However, if they can get past those two things then deleting the DPF and DOC (same as cat on cars) and replacing them with a DPF delete pipe will make the truck run much better especially in stop and go traffic. The oil will stay cleaner and engine wear shlould be reduced. The truck will no longer "clean exhaust filter" as the filter will be gone.

To do that you must have the pipe for the exhaust and a tuner capable of deleting the DPF. H&S makes excellent tuners but because of an agreement with the EPA they no longer sell "delete capable" tuners. So, be careful, to delete you must have a tuner capable of programming the delete out of the computer. Like someone above said there are some speed shops that are selling delete capable H&S minis that they have unlocked. There is also a company called Spartan that makes a very good delete tuner. As far as I know they are still doing business right out in the open. Gee, wonder how that happens. There are also some on ebay from time to time. I would google "DPF delete" and see what comes up and take a look at Spartan Tuners.com. The installation once you have the parts is pretty simple and can be done by any shadetree mechanic.