I have a 2014 Ram 1500 Express. I'm having a difficult problem finding anything after market that fits this damn truck.
I stopped by my local truck parts place (4Wheel Parts) and asked about a leveling kit for my Ram. I was told that the manufactures for the 2014 A-Arms on the truck did something wrong and the ball joints are popping out. The tech told me no 2014's are able to get the leveling kits installed.
Do a search on he forum and read through some of the treads. You'll find all the information you need to know. Any leveling kit for a 2009+ 1500 will fit your truck.
I have Daystar's 2.5" on my truck with no issues... and I personally know of others who own '13+ with leveling kits and are experiencing no issues. There's a chance that you could have problems with any suspension mod- on any MY vehicle.
All the physics aside, with pinon angles, calibration, and excessive torque on related components, I believe poor installation is the primary cause of most of problems that you see posted...
HA good ol 4wheel parts... Well i have a 2014 express with hell bent steel 2" kit installed everything is fine truck rides the same as factory but looks WAY BETTER! good luck