Yep. I know. I did the CAD drawings during R&D on it last year. Sad part is, even the 6.7 cummins truly didnt need a DPF or DEF. Emissions levels were right on the line for the allowed limit so cummins went ahead and added that stuff to be safe.
My 6.7 Ford will, and has, walked a 6.7 Cummins. The 6.7 Cummins is over matched by both Ford and GMC in real life situations/towing.
The 6.7 Cummins really responds well to emission deletes.