When i replaced my motor mount i noticed this fitting. It just wraps around the header and I can move it. Looks completely useless just kinda hangs out. Just wondering if i should do anything about it or just leave it there.

 

That would be for the preheater tube.
Goes from the manifold to the undersde of the horn on your air intake.

 

Yea, It feeds warm air into the Air horn when its cold, Looks like your not using it anyway. It wont hurt to leave it, Unless it rattles. Then ditch it !

 

You don't need it unless it gets pretty cold where you are. If it rattles it will keep you awake.