[Gravy]

Yes they are, the air comes in the front of the car(over the Radiator i believe) and up on top of the IC and down though the motor. They designed it so it would flow out with the rest of the air coming though the radiator though the bottom of the motor so there's no risk of backwards flow of air, even at idle. I.E. the radiator fan motor pushing air into the engine bay and up out though the TMIC piping.