Don't know for sure about yours in particular, but they kind of look real similar in design to Hyper-Flow cats that I had on my former 355. Good luck ... hope you figure it out!
Is there a pre-cat bung location? To me, it looks closest to a hyperflow, but those have a pre-cat O2 bung welded in.
Does look close to hyper flow, thanks for the input everyone: Hyper-Flow High-Performance Ferrari Replacement Parts