hello, i want to replace some of my oem fittings/hoses with an fittings and braided lines but i dunno whats the correct size to order for either an fitting or flare fittings.

I want to change the following parts:

1. The hose that goes from the fuel rail to the fuel filter(whats the size of that hose and what an fitting i should use).
2. The hose from the fuel rail to fuel regulator
3.The hose that goes from the brake master cylinder to my g.e. vacuum manifold
4. The hose that goes from the vacuum manifold to the back of the intake manifold

anyone knows the oem hose sizes? I really dont understand how an fittings/hose sizes work and i dont want to order them and in the end to be oversized. Note that i live in EU and there are different metric methods here so thats the problem why i cant find the hose sizes

thanks

 

This will help you understand AN sizes
http://www.anplumbing.com/thread.html

And i'll guess at your list:
1.) -6
2.) the vac hose? -3
3.) -8 or -10
4.) -8 or -10 as well

 

its all based on 1/16's

so -4 an = 4/16" = 1/4"
and -8 an = 8/16" = 1/2"

 

thanks a lot guys

 

like said

-3 = 3/16
-4 = 1/4
-6 = 3/8
-8 = 1/2
-10 = 5/8
-12 = 3/4