Looking to get some an fittings for my stock s4 fuel rails. I don't have anything to measure the right thread and pitch from the rails. Anybody know what AN fitting I will need.

 

(Info from ReTed..thanks.)

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.
*****************

NOW you can use anywhere from -6 to -10(overkill really).
I use -6 and run Rising Rpm rails,.Aeromotive regulator and Big *** injectors!

 

I was looking to use the stock rail but after doing some research I may have to get new fuel rails. I just don't of anyone doing fuel rail for the s4. Thank you for your input.

 

Here..you just didn't get it.
you USE the S4 TII rails.

http://www.fc3spro.com/TECH/MODS/FUEL/pararail.jpg

(again thanks to ReTed for his info..credit where credit is due.)