I have a OMG RARE JDM exhaust for sale. Taking it off the car this weekend. No sure if the piping is 2.25"
It's a Integral Kobe. Here is a dyno vid with really blown out, over-modulated audio.
If you want to pop over some time to hear it before I take it off, let me know. Looking to get $300 for it.
Pictures of what one looks like off the car can be found on this ended Yahoo! Japan auction: http://page5.auctions.yahoo.co.jp/jp/auction/e136852030
That's not my exact one. But it's just like it.