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Message: <blockquote data-quote="Allen Gamble" data-source="post: 184651" data-attributes="member: 4956">To be honest I can't believe you made it that long. Cummins recommends a DPF cleaning at 75k miles and I've heard of many trucks needed full DPF replacement before that.... most of it due to underuse. People don't realize (not saying you Allen) that with these new diesels they need to keep them on the highway and use them for what they're meant, pulling. Depends on the money you want to spend or have available. A good tuner and full exhaust replacement can cost well over $2500, but so can a new DPF. I always wanted to delete and tune mine as that's for sure the best bet for the longevity of the motor, but I sold it before I could save that kind of money. The problem with tuning is understanding all the extra power you are running through your truck and driving it right. Not like I would when I was 22 which involved smoking people out with my exhaust.... HOT rodding a tuned diesel will surely lead to head gasket and transmission problems. Many tunes recommend you put head studs on as well. I'll quit rambling now.- - - Updated - - -Depends on the dealer..... most of them will void your warranty if you still have one unless you are in super tight with them. Just remember, if you do trade at some point in time they will not give you a penny more for all those deleted emissions parts you spent your money on.</blockquote>