Signal Antenna & Network Signal Booster (Increase available Outposts) Shelving Units (Increase storage of all resources by 2) Ammo Presses (Specifically Rifle Ammo is the most valuable) It's meant to be a companion list for you to easily check while playing if you forget.
This is a very short list that goes over the best Facility Mods in the game to keep an eye out for. Below you will find a brief list which I took from my State of Decay 2 Walkthrough page. My qualification for 'best' Facility Mod is mostly subjective and my opinion I picked both the Facility Mods that I used the most often when playing and also the Facility Mods that I saw other people using when they were playing the game. On this page you'll find a list of the best Facility Mods rather than a list of every one in the game. There are a ton of different Facility Mods in State of Decay 2 that you can choose from for your base, if you'd like to see a complete list of every Facility Mod in the game then follow the link provided. Best Facility Mods - State of Decay 2 Guide