997 Internal AOS - Is it an upgrade? Do they even exist?

[nuvolari]

Very strange but when I first was reading all about 986's, I came upon a few articles about upgrading the internal AOS on our Boxsters to an updated 997 part which is basically just tubes instead of actual AOS's. I'm not talking about the faulty AOS on the outside of the engine that causes all the problems but instead the two inside the oil sump that return the used oil to the oil pan and route it through two separate AOS's. But now after spending quite a bit of time searching for these articles and part numbers, I can't find anything. I've searched countless 997's, including many different years (05-12) and models (S and non S) and I can't find any one of these cars that takes a 997 numbered internal AOS. They all call for the same 996 part on our cars.

So what's going on? Are the updated 997 parts still available? Is it an upgrade? And by upgrade, I mean do the experts update to them or do they find fault with them?

And if anyone knows the part numbers, I'd love that info too as I can not find them anywhere anymore.

Thanks.