Leaking antifreeze from somewhere that is hard to explain?

Leaking antifreeze from somewhere that is hard to explain. There is a hose coming out of the fire wall on the left side of the engine and goes into some kind of manifold on the left side. It is leaking out of that manifold next to my fuel injector. I was told that it could be my thermostat housing but it isnt. The thermostat housing is connected to the same manifold piece but on the other side of the motor. The manifold comes apart I think but I cant get it off. I think it has some kind of gasket that went bad but im not sure. Anyone know what that manifold is called? Or what it is