Based on the second label stuck on top of the first, this was pulled and shipped 05-09-2000, the tag and tube had similar amount of shelf wear and grime and one of the staples was under the tag with no evidence of ever being replaced, best I can tell it's a genuine Porsche part.
Of course being eBay and an old part anything could have happened to it.
But it fits correctly now.
I test fit the intake manifold today, and am now stripping a few more pieces of engine tin.