bit of help please.

hello,
ok i need a new exhaust just the center part. as where it connects to the end of the tailpipe its erroded so is blowing a lot.
On ebspares they do the standard replacement.
But as eventually i will get a Ragazon tailpipe, would it be ok to buy the Ragazon center part at the moment. and will it be ok for this to go onto my original tailpipe(backbox)
heres part im getting.
Ragazzon Stainless Steel Central Pipe

http://shop.alfisti.net/Tuning-Styli...ipe::1527.html

....no help?

I'd just replace it all with a Larini cat back system... cause that's what I did