Air intake and exhaust. Air comes into the intake located at the
front of the aircraft and exits at the rear of the aircraft.
This is such a load of crap!
A jet pipe is located at the back of an engine, just after the
exhaust!
It is connected with a gas tight sealing ring and just before
the propelling nozzle. And pipes the exhaust gasses out of the
fuselage/Wing...
A/C engineer.