That is a marine fuel pump. The hose barb connection is a safety feature in case the fuel pump has a ruptured diaphragm you would connect a clear hose to that fitting to route the raw gasoline away from the bilge on your boat. On a car a fuel pump with a ruptured diaphragm the gas would just drip on the ground, in a boat it would drip to the bilge and boom! It will work on your car no problem