That seal comes over top of it a little ways. If you were to cut it right where the body line starts to curve up towards the window that seal comes around that curve and up and over your headliner... Also you can just leave it like that if you're having someone come in and install your window they may be able to just trim it for you depending on how much do they do or don't need. Also if you're doing it yourself you can go ahead and just put the seal tape it up in to place and see what you need...