very very bad idea. the window is surely to hit the coil on the back of speaker. stocks are only rated at 30w, pretty much anything other than some infinity slimline series requires spacers.
I thought so too, My brother and I did it on our cars, both gen 3 libs, different speakers, and they fit with ample room. I was ready to buy/make speaker mounts, but there weren't needed.
Screws were too long (not screws that came with the speakers), which is what farked me up, shorter screws, work fine now.
So if you do do this, be ready to make speaker mounts if you need to, and install them with windows down all the way.