Right as you may well know im using a 4age with efi and i now find that there is a fuel return to the tank. Does this mean that i need to have two pipes running through the trans tunnel? the regulator and fuel return start at the fuel rail on the engine. Do i need a fuel return??

you will need the return,normall on the outlet from pressure reg

B#gg#r need more fuel piping then......

The return can/should be a smaller diameter

8MM feed pipe and 6mm return pipe are standard for the 4AGE