<----- this is the link to the video i took before you said something about the smoke in oil filler. I did notice it was doing that, but this video shows the tail pipe smoke and the noise.
I am not sure if it is totally stock or not i do know it has a prodrive axle or cat back havent inspected too much. It has some really shiny turbo heat sheild and at 3" downpipe whick is stainless. so other than bolt ons yes its stock as far as i know. as for a tune i dont believe so. there is no cobb AP but i havent looked at the ecm/ecu to see if it has a program in it. I still have alot to learn about these cars.