I had a similar problem, or lack of understanding. I got one of the plastic clips out but couldn't see the other one. After trying to finesse it I just gave it a good yank and the unseen pin broke or popped out. I couldn't find it so I'm not sure which. The weatherstrip is not needed with the intake. It's like anything, if you know how it comes apart its easy and if you don't you risk breaking something. It will only be an issue when and if you want to put it back to stock. And then you only need to find the right size black push pin. Enjoy the intake.

Les