So im doing a z6 swap in my 89 and im using the stock a6 injectors do i have to use the a6 FPR and Fuel rail Nut?

 

You will be fine using the stock a6 parts

 

But i want to know since im using the z6 fuel rail with the a6 injectors, do i have to use the a6 fpr and fpr nut?

 

Use the z6 fpr, it clears the IAT, And the nut

 

okay so the z6 stuff would work cuz i read in this site the a6 is better just trying to confirm
http://www.hondacivicwagon.com/bb/vi...hp?f=7&t=13540

 

i used z6 everything in my swap

 

I searched that site you linked to and found nothing saying that the A6 injectors were better.
It only implied that using A6 injectors made converting easier since it's basically plug-and-play.
So no confirmation for you!

Z6 works fine, needs a couple simple wiring mods, and leaves your engine wiring a little cleaner (no resistor box).
A6 plugs right in.
Both sets of injectors have the same flow rate.

 

i didnt mean performance better i meant as in less hassle