i just sourced a euro head and manifold

How much did that set u back bailz?they are 4 port arent they.

The CA cossy head :) usually from OS so have to factor freight.
I have one without cams but bought Japanese HKS cams for it.
Also chopped the primary manifold as its severely restrictive
for the size of the inlet ports. Mine was getting custom runners
to suit the ports and equal length plenum design.

Each port is like 56mm wide and 48mm tall massive to suit short
stroke ratio design and boost but mani runners are bottlenecks.

i got it with a spare ca18det that I bought....didnt realise until I pulled it down that it has 4 ports instead of 8

Thats 700-800 dollar reasons to celebrate great score!
The cosworth of Nissan heads for free gotta love that.

design like this d? I still like the 8 port better

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X-sactly that kind of split plenum but the Toyota Beams Yamaha headed 3SGE is the best Ive seen as it has no sharp edges.

4 ports all the way! 8 ports where tried and left behind.

Hi guys i know this is a stupid ? but is their a gasket between the mani and head.

Yes, 4 ports are better for full-throttle, high RPM use. Makes a bit more top-end power.

But the 8 port manifolds actually make a lot more torque below 2000 RPM (about 1/3 more power), and are very close to the same top-end power.

With a redline of say 8K for a worked motor, and a turbo that spools at say 3k, you're going to be using that extra bottom end that the eight port head gives in 1st gear only. In a hard launch you'd be above 2k anyway, so I say four port all the way!
(Only because I have one of course! hahaha)