my dealership parts guy confirmed today that if your 2012 ram was manufactured after July, 2012 (exact date - I've forgotten), then the 2013 projector headlights will replace quad headlights with no fitment issues. He was unable to tell me whether or not the LED turn signals (which are in the 2013 proj headlights) will be plug n play. More than likely they'd have to be spliced and probably need a resistor, he said.
Eventually I'd like to upgrade to hid projector headlights 35w 4300k. But I am in no rush, maybe I'll ask santa for christmas this year LOL
Ummm..After july 2012.... 2013 models started production