There was actually that argument on SA and its just people misinterpreting the design, "The white and gray arrows in my design represent the air exiting the turbo. They're exiting the round part, as the diagram suggests they should. The big wavy lines are the air prior to entering the turbo. In my drawing the air is going in via the big square hole, and it exits out of the circular hole, in the form of pointy arrows." Quoted from the designer of the shirt.

From my understanding of turbo's that is correct, there are a few diagrams he posted to back it up, but anywho it looks cool .

 

thats 1/2 of the way the turbo works... its just missing some more wavy lines... there should be some wavy lines going into the turbine on the side and some more wavy lines exiting the back of the exhaust side of the turbo

 

Ya but that would look god awful on a shirt.

 

where theres a will, theres a way