I am new to the diesel family and needing to know a couple things. First off I'm running 37/13.50R20 and I'm not expecting a lot but I just need to know. I have a S and B cold air, H and S mini maxx (doesn't have dpf or egr delete), and 5 inch mbrp exhaust. Since my mini maxx doesn't have the dpf/egr delete, would it hurt to get a dpf delete kit? Or do I just need to buy another tuner??? Also would a lift pump help?? Any information will be appreciated.