They are supposed to be Eleanor scoops. as in Eleanor the Mustang from Gone in 60 seconds. Those are way too small. They should completely cover the rear window and part of the metal surrounding the window. Look at Cervinnis to get some properly sized and beautifully made parts, available painted to match.
If you like the little ones, more power to you. They look goofy and unfinished. That's not the surrounding trim. That's the window. Those scoops are way small and don't cover the entire window as they should.
Actually that is covering the whole window with the outer edge painted black. The Eleanor scoops are way to big and stick out pretty far, which isn’t the look I’m going for. I found them, they’re DG vector scoops, but they’re discontinued