That one wasn't from silvia parts. It was one of the original imported into the US from Autoexec. Someone sold their grill to silvia parts, which cloned the design, and reproduced it en masse for the american public.
Some people have had little problem with the silvia grill, while others have had fitment issues which required some work to get to fit 100%. (Filing and sanding the edges). [btw thats my old car in the photo]