I installed one on a 2013. On mine at least there are brackets that hang down on each end of the cross-member that need to be cut flush and touch-up painted. It takes all of five minutes and is no big deal. In addition, you may need to drill a hole on the right side of the cross-member to run a bolt. Again, no big deal.
If you look at this pic, center top, you'll see an inverted triangular bracket, right next to the sway bar mount. It is the bottom one half inch of this bracket that needs to be cut flush on each side of the frame.