What you should do is take a pair of tin snips and cut the visor in the middle to make it easier to take out of the window frame.
In channel window visor problems.
No window contact also because of their out of window design tape on deflectors don t make any contact with the glass or window mechanics.
That means there s no risk of scratching the glass or interfering with window operation.
Leave the visor in place and do not roll the window down for a few hot days to allow the window with the visor mold into place.
I ve only had in channel visors on my vehicles as i think the outside mounted ones look pretty awful just my opinion but i ve never had any problems with the power windows not operating properly.
Pull out the pieces and don t worry if the rubber gasket comes out with it because you can clean off the adhesive and pop the gasket back in the channel.
Also you will need to tug outward on the visor when you roll the window up the first few times or the window will catch on the edge of the visor and possibly break.
Obviuosly the first time you put them on and roll up the window it ll be a tight fit but that s what helps them seal.
In both cases no drilling is.
In channel vent visors are designed to perfectly fit onto your car windows channels while tape on vent visors require adhesive to fix them on the window frame.
In channel vent visors do not have this benefit.