Stainless throughout?
Yep.

Type of dp? I.e. divorced, bell, etc...
Divorced.

Cat? Catless?
High flow cat. 3" just like the rest of the system.

Resonator?
Don't believe so but this thing sounds awesome on the car, not extremely loud. Sounds pretty close to stock but a little deeper and raspier, but it is a lot more aggressive at WOT.

Canister or oval type muffler?
It's an oval can.

# of tips?
1 tip. I believe it's either a 3" or 4" tip.

Mileage?
Not too much.. I believe around 10k miles but I'll have to ask him and let you know.

Location?
Tampa, Carollwood/Northdale area.

This MRT? http://www.mrtrally.com.au/performa..._WRXturboEx.pdf
Yep, that's the one. The muffler looks just like that one and it has the cat coming almost right off the turbo like that.

I hope that helped.