Swapping out stock exhaust with Cobra slashcuts

[burkazoid]

I'm in the process of swapping out my stock exhaust with the Cobra SlashCuts. I've taken off the stock exhaust system. Do I also remove the black device with the four ports which the stock exhaust system connected to? That's the catalytic converter, right? I assume I do, because if I don't, I'm not sure how all this is all going to hook up correctly without looking strange.

This is what I get for taking the stock system off at ten o'clock at night.

(Hope I'm not looking a little off today!)

Best,
Steven