I develop a leak we're someone cut the metal tubing and replaced it with a rubber hose and clamp them .., so is this metal tubing be able to replace ? Or should I cut it up more and replace it with new hoses and clamps .. I think this is a return line ..

 

You can get most of the pieces at the dealer. Many of the rubber bushings have been discontinued, but the pipe and hoses are available. Talk to the dealer and double check.

http://www.nissanpartsdeal.com/parts...ng-piping.html