Name the Exhaust part?

[south]

I have a Integra Gsi '94 and recently had it serviced cause the stock exhaust seemed much louder than it should be. I was told i had a hole in the top of the "middle muffler" and not the rear muffler, and decided that this was a good excuse to step up to something more sportier.

On looking around for the net for something new i have had no luck with the search "middle muffler". Is there a different name for the "middle muffler"? Honda told me it would cost around $770 for a genuine part and $335 for an aftermarket part. is their a big difference between the honda part and the after market part? And how would it cost to put in a decent sport exhaust system (cat-back?).

Cheers,
South