I was glad to run across this accessory, it helps hides the unslightly gap in the back with out any issues. The front took care of the rest of the gap that was there from the manufacture.
The install of the rears was painless and done in about 10 mins. The fronts took a bit longer. The trick that I found out was if you start in the wheel well closet to the cab and work your way to the front. I went through about 8 clips on the driver side before I pulled it all back out and started over.
But love this add on, and waiting to try it out in the mud and not have to clean out the engine bay afterwards.