H&S Black maxx WITH DPF, egt mileage?

[44magnum]

Ok so I finally got my H&S black max installed last week, still have the DPF and I was wondering a couple things, first off what egt temps are normal for the "Hot" setting? I have been seeing 500-650 cruising around but then today driving down the hiway at 73mph I see my egts got to 1100 then 1300 they hovered there for about 10miles at which point I turned off the hiway and noticed how sluggish it was being, so I stopped and the egts dropped I let it sit for a minute then took off and everything worked as should. Did I go into regen? it was the first time since the start of planting that I have cruised for anything more than a couple miles at 55mph. Also what kind of mileage change are you guys seeing with a tuner while the dpf is still on? Thanks in advance.