You confused me there for a moment...trying to figure out how the "catalytic converter" was on the intake. Until I looked at the article. Now it makes more better sense
That used to be called the carbon trap. Removing it IS going to give you a performance nudge. I would say probably 99% of the cars out there that had them now have them removed. Ford quit sometime late in the 05 run even putting them on the cars. Yes, yank it out. BUT...do a search first on carbon trap before you do, will give you some pointers on the easiest way to get it out.