Nope, your right there, but I'm not making any claims to the possibility of things I know nothing about. However, what I do know, is that I didnt get my factory can on my T3 because they could not make the noise level requirements. Having said that, I know how much room there is under the hood of my sled and I know how much room a turbo takes up once it's installed. After all that, there is no way that the stock suit case (to meet noise restrictions) and a turbo will fit. That's all I'm saying, I could also be in denial about it, being my turbo is getting installed as we speak. I imagine a factory one would be exceptionally cheaper.
Tons of Room for any type of muffler you could ever want. You may even be able to get the ol' suitcase into that space.....
I think the noise aspect will be the easy part. Fueling it lean enough to pass emissions but not detonate in the midrange would be the real test.