Why is the metal box connected to the exhaust pipe dripping water?

[BradleyDella]

The reason for water dripping from the metal box connected to the exhaust pipe: After gasoline is completely burned, it produces water and carbon dioxide. At high temperatures, water exists as water vapor, which is colorless and transparent. However, when the temperature drops below 100 degrees Celsius, the water vapor condenses into water. If the condensed water droplets are suspended in the air, they appear as white gas. When the ambient temperature is low, the white smoke from the exhaust pipe is water vapor. If the condensed water droplets accumulate, they turn into water. The exhaust pipe is equipped with a device to reduce vibration and noise, facilitate installation, and prolong the life of the exhaust muffler system. It is installed between the engine exhaust manifold and the muffler, making the entire exhaust system flexibly connected.