Are the manifolds stainless? any Stainless Parts?

I have a 360. I am working with an artist who makes custom furniture out of stainless steel.

I would love to tie in some of my old used ferrari parts. I tried googling it, and I know the aftermarket ones are stainless, but I can't find anything on the factory ones. Given there is zero rust on it, it seems reasonable that they might have been?

Then I don't want to create a laundry list of unique pieces, but are there any commonly-replaced parts that ARE stainless steel?

 

Whats interesting is that in North America (maybe just the US), we have a different manifold.

I have zero rust on it, but since everyone is stating they are a semi-stainless, I'll probably avoid using them.

The art he does is cool because if you know what your looking at, you can tell they are scrap/automotive, but if you don't, you'd have no idea. He wouldn't like weld on a whole manifold, but would break it down into smaller pieces that he'd weave into it.

Thanks for the responses!