Not true. Unless you mean the lower portion is replaced. You need a gen 1 LS grille and remove the lower portion. As was said, the mesh sits in a channel in the lower grille piece. The lower piece has a tang on each side that sits behind the upper portion. The lower piece also has the clips that snap into the lower hood. The mesh is really heavy-duty and strong. Unlike that stamped stuff ebay sells, the CDC mesh is a "weaved" wire design.
I stripped it because I got tired of the black paint getting chipped. It turns out I really like the au naturel look.