Cat-Back Conversion

I have a ZC engine and I plan on swapping it, course, i always say that, but anyway, its not gunna be for awile, so I want to buy a cat-back, but I dont really wanna trash it or sell it when the swap does happen, so what all am I gunna need to do to switch the cat-back to the b18c1's cat??

Just get a catback you want and when you do the swap you can have an exhaust shop custom make anything fit. Chances are its going to line up fine.