This is a the hard metal pipe with the nut and nipple (that is soldered to pipe) which connects the outlet of the 1963 to 1974 MGB Fuel Tank to the Inlet of the Fuel pump. During the years of use this pipe gets damaged and kinked, which equals low fuel flow. Low fuel flow is a low horsepower, which is not good. Replace your line when you change your fuel tank. Since the pipe comes in a roll, some find it easier to use a tub bender to clean bends, other are fine with homemade options which work well too. It is a good idea to check your Chassis number on your MGB, this line is good from 1963 to 1974 ending with chassis number 360300.
