Thread: anybody replace, feed + return fuel line from pump to rail ?

Back from the dead. Can anyone confirm the size of the three fuel hard lines that run along the frame? They are no longer available from Nissan so I was just going to bend some stainless tube down there. But I want the hard lines to mate up with the stock rubber lines. Done a bunch of research but couldnt find much. Looks almost like -6 AN and -8 AN but I've also heard they may be metric....?

The fuel lines are 5/16".

not the hard lines, the rubber lines that connect to them are that size. they are 8mm or about 5/16"

there are also only two hard lines for fuel. Feed and Return other line is a vent to the canister in the front of the car by the firewall on the frame rail

Man I did this years ago to the B14. I replaced all the hardlines to the back. Doing the tank, holy eff that was annoying. I did not drop the tank and made bends as I could, as close as I could, as I got to those bends. Those lines will not rust but the rest of the car will. Sorry I have nothing to add here. All of that info is lost, none of that was recorded.

Ok so all three are 8mm? Guessing I can't get metric tubing so I would hope 5/16" OD would work and should mate up with the 5/16" ID hoses. Sweet. I'll see if I can dig up some quality SS tubing. Appreciate it greatly fellas.



Ya it looks like a royal pain, especially bending and fitting them. Contemplating changing all the hoses while I'm in there doing the hard lines. Not sure if its worth it though. Are they even available anymore? Gotta love old cars.

Blew a brake line and I don't want that happening to the fuel hard lines as well. Scary.

hoses are just regular 5/16 fuel line can get that from local auto store. Contact gregv at gspec and see if he can get the hard lines, i know he was able to find the hard brake lines for me