Catalytic converter, in header/and-or muffler?

[Kawiboy_imp]

So where exactly is the catalytic converter on our bikes?. Judging by the bulge in the header collector, I would say header..

 

[Gumby 1100_imp]

What does the OEM collector look like?

You'll want to check out this thread by kDiqq who removed the cat material from his header collector...