Frostycrowd

iTrader: (9)

A few simple questions about the primary fuel rail.

Are s4 TII and s4 NA primary fuel rails identical?

are the threads the same pitch on both side of the fuel rail?

What are the thread size and pitch of the in and out of the fuel rail?

Thanks!

farberio

iTrader: (7)

They are not the same, which are you trying to use and what are you trying to do with it?

Frostycrowd

iTrader: (9)

Well mostly I am just trying to figure out what is worth saving, and what I will get rid of...mostly.

I am using a turbo s4 primary rail and I am trying to figure out the thread size going into both sides so I can order the proper AN fitting and lines

farberio

iTrader: (7)

This thread has the sizes for a S4 turbo rail.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/what-should-i-need-400-hp-fuel-system-823306/

Frostycrowd

iTrader: (9)

I dont see anything in that thread that explains the thread size of the banjo bolts on the primary rail.

farberio

iTrader: (7)

There are only two things threaded on the primary fuel rail, both are supplied on the picture.

Frostycrowd

iTrader: (9)

I guess i did not see the threads listed on the picture, thanks for clarifying

Frostycrowd

iTrader: (9)

Okay so the diagram in the other thread is not right for my rails. Neither one of my rails, primary or secondary are threaded the same. I don't know what the deal is but it is a headache.

Evil Aviator

If you think that you have aftermarket or altered rails, then just take them to your local hardware store or race shop and see what fits.