Rb25neo Na Head Vs Rb25neo Turbo Head

[skyguy61]

Hey Guys,

I was just wondering if these heads are the same, also is there any mods needed to bolt these heads to a Series 1 block, cheers

[Dale FZ1]

Search for a thread on this one a few months back - has pics and all.

The N/A Neo head evidently has smaller ports

[Sarumatix]

From what I understand, R33 head and R34 head are the same between DE and DET, R32 head is different (as indicated in FAST). But I have also read that they have different port sizes *puzzled*. I have an R34 de and an RB20det, I am under the impression you can make one engine out of these .