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State the purpose of exhaust system?

The purpose of an exhaust system is to safely and efficiently conduct exhaust gases (containing combustion byproducts like carbon monoxide, unburnt hydrocarbons, and nitrogen oxides) away from the engine and ultimately out of the vehicle, while also:

* Reducing noise pollution: The system muffles the loud noise produced by the engine's combustion process.

* Managing backpressure: It controls the backpressure in the engine's cylinders, optimizing engine performance. Too much backpressure restricts exhaust flow, hindering engine efficiency.

* Protecting the environment: By directing harmful gases away from the immediate vicinity and, in many modern vehicles, through catalytic converters, it helps reduce harmful emissions into the atmosphere.

* Preventing corrosion: The system is designed to withstand exposure to corrosive exhaust gases and prevent them from damaging other vehicle components.

In short, the exhaust system is crucial for both the performance and longevity of the engine, and for protecting both the driver/passengers and the environment.