Correct answer
Channel exhaust gases through the system towards the outside.
Channel exhaust gases through the system and towards the outside. Layout and components vary by vehicle; not every pipe necessarily joins a catalyst to a silencer. A silencer reduces noise and a catalyst treats certain pollutants where fitted. An exhaust pipe does not cool cooling-system fluid.
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Its only function is to silence the engine, without carrying gases.
Cool engine coolant.
Channel exhaust gases through the system towards the outside.
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