It had a 3" exhaust fitted to the factory turbo, however the dump pipe (while still being a heap better than standard) for the standard turbo was only 2.5" and the exhaust then bolts up to this and flares out to a 3 ". So as it sits now the new turbo comes with a 3" dump directly from the back of the turbo and the flared exhaust is bolted to this. I think its a couple of pages back you will be able to see the exhaust and what im talking about.
The new 3" I am getting fitted next monday, its a 3" mandrell bent stainless system with no muffler (the current exhaust has a muffler) so I am looking forward to it sounding a little tougher as well.