Exhaust Manifold Step 2 - After collecting exhaust gases, the manifold disperses them at the manifold flange connection.
Exhaust Manifold Flange
Exhaust System Head Pipe Step 4 - Exhaust gases then travel to the catalytic converter, which houses the oxygen sensor. There is a primary sensor located on the head pipe, this device is shielded from the body using a heat shield.
Catalytic Converter w/Oxygen Sensor Step 5 - Once the gases are treated by the catalytic converter and read by the oxygen sensor they are released into the primary transfer pipes.
Primary Transfer Pipes