2017 ram 2500 broken manifold bolts

I've got a buddy with a newer Power Wagon. Bad *** truck, but he says he averages about 11 mpg, around town its closer to 8.

I'll stick with my 5.7 for now, although it needs more power in the 3500rpm range. I tow my camper a TON with mine, and it really struggles getting up to highway speeds.