Does this sit on top of the stock grill?

[Mr_Q]

http://www.classicdesignconcepts.com/catalog/itemdisplay/636.html

Was wondering if this goes on top of the stock grill via 3M or is it a bolt on replacement.

And I only want the main upper grill, I want to leave the bottom stock.

 

[bigcat]

overlays install over the factory grille.