Take it from a guy who started making wood-based block-off plates as part of a high end install shop back in the 1990’s… these block-off plates will improve *ANY* speaker you put in your door. They close off the massive gaps that the manufacturer seals with flimsy clear plastic and makes something like an enclosure (or at least infinite baffle) possible with otherwise factory doors (meaning no pods).
I strongly suggest there be sound deadening material on the entire door, but at a bare minimum make a gasket with it to help seal the block-off plates.
Screws included are *greatly appreciated* and work well. I’m very impressed with the overall quality and thoughtfulness of this. HIGHLY RECOMMEND!