Modifing S4 Fuel Rails

[vex]

Originally Posted by WE3RX7

The rails should already be threaded...

The secondary rail is not threaded where the Pulsation Damper is. It's a flange.

[RETed]

S4 fuel rails should be all metric threaded.
At least US-spec ones are...
I dunno where you got your secondary fuel rail from, but all US-spec S4 turbo fuel rails have the PD on the primary fuel rail.
The PD end should be 12mm x 1.25.
The other 3 ends should be all 14mm x 1.5.

Aeromotive just came out with an adapter that goes from 5/16" hose end to -6AN male.
This makes it a lot simpler to mate our stock fuel lines to any AN set-up.


-Ted

[vex]

Originally Posted by RETed

S4 fuel rails should be all metric threaded.
At least US-spec ones are...
I dunno where you got your secondary fuel rail from, but all US-spec S4 turbo fuel rails have the PD on the primary fuel rail.
The PD end should be 12mm x 1.25.
The other 3 ends should be all 14mm x 1.5.

Aeromotive just came out with an adapter that goes from 5/16" hose end to -6AN male.
This makes it a lot simpler to mate our stock fuel lines to any AN set-up.


-Ted

My rails aren't turbo. I don't have access to my car at the moment, but I will try to snap a picture of the rail. There's definitely a flange.

Just double checked it, there's a flange for the FPR on the secondary. It has two mounting bolts (probably 10mm) that hold it on.