Torpedoes are ammunition for the Torpedo Launcher. Each Torpedo Launcher can hold 30 of them. You cannot install torpedoes unless you have also installed a launcher to fire them from.
-Outfitter Description

Weapon Details

The Torpedo is fired by the Torpedo Launcher. The Torpedo Storage Rack can be purchased to increase your maximum ammo capacity.

Outfitter Locations

The Torpedo can be purchased at the following ports: