Fuel rail question?
 

I have a S5 TII Intake manifold for my NA Turbo conversion, will the S4 TII Fuel rails work on this intake manifold or will i have to use the S5 Tii fuel rails.?

also can you use the NA fuel rails or are they different too?

S4 and S5 T2 rails should be interchangeable. Well...I know for sure the S5 fuels rails can swap into an S4. I'm assuming it'll work the other way.

NA and Turbo fuel rails are inverted. For the NA, pulsation dampener and pressure regulator are on the end farther away from firewall. On T2, on the closer end. Don't know for sure if they're interchangeable.

Um, no.
The Kouki FC turbo fuel rails need to be shimmed if being used on the Zenki FC turbo lower intake manifold.
For argument sake, they are not swappable.
They mount differently.

All primary fuel rails, turbo or non-turbo, can be swapped - be careful of the PD position though.

I don't think the turbo and non-turbo secondary fuel rails can swap.


-Ted