either will fit. the only thing that won't fit is the midpipe which includes the J-pipe section for the MSP, which is the piece with the cat, in front of the section you're looking for.
i have the power series i'd be willing to let go. i dont have the muffler portion, i have the other 2 pipes. header and cat back ones. thats what you're looking for right?
I am pretty close to buffalo. So if it were to be shipped, shipping would be in the US (not across the border), and I would just go and pick it up to make things easier.
I have the full CS Power Series exhaust on my car and I am looking to replace the muffler because with my header... it is loud and I want to tone it down some.