Take a moment and introduce your self, along with where and picture is great.
Cat, follow headers to bottom of bike, first sheild covers a bulge. It's in there.
Tough stuff to get out.
Sai, under the gas tank top front of engine. Small plates cover the reed valves.
Removing cat, plus nice exhaust and proper tune = more HP
SAI removal will reduce burble and flame effects. I like both.