They have been removed and reinstalled a few times now. Problem is you need to have the front bumper off to install them and there is no template for cutting out all the plastic pieces your fog lights used to attach to. Once they are installed by what ever means 2 way tape, caulking fiberglass etc.. You now have to bend in the 2 ends of the bumper cover like folding in butterfly wings, where they clip into place and meet up with the fender. This is when you notice the gap opening up on the outside edge of the piece.
Yes they utilize 2 bolts molded into the duct that are suppose to use 2 of the holes that mounted the fogs but you have to take out so much of the material around these 2 hole you get some flex and find that the radius of the part compared to how tight the ends have to flex in to meet the fenders are not the same curvature.
The tape pulled off twice and I ended up having to pull the bumper back off clean up the tape mess then use multiple clamps and construction adhesive. Let it set up for 24 hours, cleaned up the excess. Then took to body shop for some minor bondo, sanding then mask and paint and blend into rest of bumper.
After the first winter I noticed some cracks and gaps around vents the next spring.
I have since done a bunch more stuff to the car and this year resprayed front bumper with bed liner with black initially to also cover up a ton of stone chips. Later after I liked the no maintenance of the bed liner, I resprayed it this time mixing some octane blue paint into the bed liner.
Having the vents sprayed with the thicker bed liner in the same blue has really helped it blend better visually into the bumper cover for a smoother almost oem look.