RAM 1500 Diesel Tuning
"Celtic Tuning" in the UK offers a DPF, DEF, EGR, Muffler delete program for your truck's (3.0L Ecodiesel) computer and they have guys in Canada & the US who can tune. Just send them an email and they can give you phone numbers of guys who can do it.
Price:
$550 for the guy in Ontario, Canada...