Here is a photo that I haven't seen on the forum anywhere yet that has information on the SS. I thought it may be helpful to some of you.
Its inside the muffler. Probably like every one I have cut open on my spyders and motorcycles. Its probably a small 6 inch long unit inside the loop in the muffler.Ahh... Cat Must be hidden under the heat shield. I'd find it hard to believe that it would be integrated with the muffler.
Wondering how this impacts my plans for an aftermarket header. Some cars have pre and post cat O2 sensors. That too would complicate things. I'll want to ride it stock for awhile anyway. SM's reviews sound like it's a blast as-is.