No catback in the world comes with a catalytic converter. Hence the name "catback." Everything to the rear of the cat.
OBX headers are not a high quality product and are probably far from "efficient."
Of course these items will work on your car, or else companies wouldn't sell them... What exactly do you want to know? Horsepower gains? I expect you'd gain 10-15 HP with the catback and OBX headers.
Seriously, I think you can find all of your answers by searching, but it's really hard to answer when there's no clear question. :?
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