Are you doing both grilles?
Like LoCo said, the front oval one is a PITA, but looks good. Unfortunately, it does not work that great as the mesh between the chrome ring and black piece does not allow them to properly join again...
And I forgot to put adhesive on the screws...so I just have welding stuff all around the ring...hopefully it will prevent them from backing out. I'm not sure what kind of force is exerted on the chrome ring everytime you brake...but I'll find out.