On the 13B EFI cars, are they 3/8"? I'm talking about the hardlines that run up against the firewall.

If it matters the car is an '85 GSL-SE.

If I remember correctly they're both 3/8". I remember thinking it was odd that the return had a fairly large hose on it. But, maybe my car just had the wrong size hose on the return line. I bought it as a rolling shell.

If I'm wrong, can anyone supply me with the correct info? I'm away from the car and can't measure immediately but need to order some items for the fuel system.

Also, which line is the supply and which one is the return?

TIA!

 

If you don't want them ship them to me

 

The lines at the firewall are both 3/8". You can trace the one from the fuel pump forward to see which is the supply. The supply line coming from the tank to the fuel pump is 1/2" there.

 

Send and return metal lines are 5/16" or more accurately 8mm on the GSL-SE. The GSL had 8mm send and 6mm (1/4") return.

 

Jeff is correct.