Something to keep in mind is the install of the stock manifolds is an 8 hour job at a shop. The motor mount has to be disconnected. If you can install the Magnaflow cats directly on your headers, you would probably pass smog test in CA at most shops, and not have to pay for near as much labor on installation.
Thank you for your reply man. I just called like 20 places that show they have the OEM one and no one has the part.
Unfortunately, I already bought stock manifolds and the longer side of the catalytic converter (Passenger) and have 10 more days to drive this thing here.
I might actually have to listen to your advice and see if I can get aftermarket cats that are California certified.
Then I need to see if they can mount anywhere on the Borla long tubes.
If anyone in this forum sells his OEM driver-side cat, I would gladly buy it used.