Maybe it was this article?

http://www.popularmechanics.com/cars/reviews/a5932/exclusive-heavy-duty-diesel-pickup-comp-test/

The 2013-up Rams definitely have DEF systems on them, as well as the 2014-up Ecodiesel 1500.


'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118