Not sealed off,yet. But the rear deck has been removed. wich helped get the air moving a lot. I do wanna re build the box and seal it from the lowest point of rear window. There's a big flat metal crossmember there.
I like having my back seats especially since it's a Cadillac and my daughter likes to ride in my car rather than me using someone else's.
Think it would be louder sealed off from there or leave it unsealed??