I will be dropping in new style injectors in place of old style. I am getting them with a whole oem fuel rail. Do i need the lower intake manifold aswell? I cant seem to find any information that i do. Is there anything else i need to get apart from new plugs?

You will need an adapter kit to mount the later (pintleless) injectors. JWT make the lowest profile C clamps which make

it easier to remove/replace injectors once the upper manifold is in place. You can get the kit from US suppliers, eg:

https://www.specialtyz.com/300zx/jwt-injector-adapter-kit.html

Thanks.I will not need the adapter as the injectors come in a fuel rail already. I am just wondering if new style fuel rail will drop in to lower manifold that was mated to early fuel rail. Would the rubber gaskets at the lower manifold differ?

 

Later style fuel rails require maching to the lower plenum to fit.

Andrew is correct the bore size is different so the rail wont seal correctly.For the sake of an adaptor kit it is far easier to swap rails

 

So it is better to swap the injectors into an early fuel rail and use an adaptor kit? I am getting confused with it now.

21 minutes ago, Tutis said:

So it is better to swap the injectors into an early fuel rail and use an adaptor kit? I am getting confused with it now.

Yes, unless you have the later lower plenum which will match your later fuel rails, go with the early fuel rails and an adapater kit. It

will be less work to install.

 

Edited November 20, 20196 yr by AndrewG

??Thanks guys. Love you