The way I secured a grill to my friend's RSX-S is by using metal ties. What are they? When you buy garden bags/trash bags, there are those metal ties wrapped in paper. Strip the paper and use a very small drill bit to make holes on the bumper's plastic grill. It works on the RSX-s because the new grill was rectangular and it was placed behind the bumper. If you get a grill that's already cutted to fit the bumper, it might not work. use your imagaination and good luck.