They were easy to install on my 2012, and I can't see the 13's being much different. You do have to drill 1 hole for the front screw in each front wheel well, but it's in the plastic part so no rust worry. You hold them up and mark where the rest of the clips will go. You put a piece of plastic by peeling the tape off the sticky part and wrap this around the wheel well lip where the clips will go. The clips are two part and snap together, easier to do than explain. After the clips are in position just put in the screws. The front ones are easy as you can turn the tires to get them out of the way. I jacked up the rear to make a little more room for the screwdriver. All in all a real simple install!!!
Oh, I cleaned and waxed the areas where they touched the paint. Probable not necessary, but only took a minute. I am also thinking about taking them off, say once a year and cleaning and waxing that area.