Put it on today.
Bottom attaches to stock lower grills.
Top attaches with 3 screws. Invisible with the new grill and will also be invisible if you decide to reattach the old grill: one for each side and one for the center.

1) Remove the stock lower grills before you attach the new ones. I now know why so many people have lost these grills on the higway-they're in way too loose. I grabbed an outside fin, gave a gentle pull and then slid each one out towards the center of the car. Before I put them back in I test fitted and then put a glob of silicone around the ends and each tab. Oh, I did not put any ties on the horizontal parts of the new grill; I drilled some holes in the old grill to match the outside verticals of the new grill after I attached the inside verticals of the new grill and then attached the ties on the outside new grill vertical pieces and put a little double sided tape on them to prevent chafing and possible squealing. Confusing? It'll make sense when you get the parts

2) I know you know to put tape everywhere there is paint before you even begin to remove the main grill. Then, just remove the top 4 screws and push the bottom out from the inside.

3) I test fitted the new grill and marked the center bottom hole and inserted the screw to keep it in place. I then marked the two side holes and drilled the holes. My screws were accessible from the inside.

4) I also painted bright surfaces flat black so they did not show through the new grill

4) A little tedious, but very straightforward and simple

5) And, it looks even better in person and the car now reflects a quality automobil - no longer looks like a soccer mom's SUV coming at you (smile)

PS: I bought the polished and it was definitely the right choice. But, I did not get it powder coated which I would do if I ordered another one.