Exhaust valve sizes

[Volhv]

Are the sodium filled valves of the 944 turbo a direct fit to a NA head?
While you can swap heads between the turbo and NA, can you also swap components?

Differences like, valve seat width (2.0 vs 2.5) and valve guide length, make my a bit nervous, but they are both 40mm...

I am asking because the valves are the same price at the local parts store. So why not get the sodium filled ones if they fit. (while I should play it safe and get the right valves, my current ones have some slight heat warping... maybe some eutectic salts would have prevented that)

[Volhv]

I uploaded a video of one of the valves I removed.
Dancing Exhaust Valve - YouTube

[Volhv]

So I guess I have to be the guinea pig and buy one.

[jem60]

I've used turbo valves in N/A heads, so should fit.

[Chunkerz]

Supposedly the heads are exactly the same, other than the ceramic liners in the exhaust ports and the sodium filled exhaust valves.

[Volhv]

As stated above, there are some very slight differences between the heads..... but I did get a turbo exhaust valve, and it does fit! I will order 3 more on Monday.