High quality, great vehicles.
You'll need this though for them to work correctly:
https://www.lcpdfr.com/downloads/gta5mods/scripts/44272-sirensetting-limit-adjuster-fixed-for-every-fivem-build/
Using the files from the updated link, both work but the connector door between the two in the basement doesn't work properly. Will attach pictures below:
FD side view:
PD side view:
They're addon weapons for FiveM. Each are literally a drag and drop resource. How you spawn them in is up to you, you could use MarkoMods/FluffyMods's menu, set it up for qbcore or whatever you want.