How do catalytic converters work? - Explain that Stuff
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WEBFeb 18, 2022 · A catalytic converter is a large metal box, bolted to the underside of your car, that has two pipes coming out of it. One of them (the converter's "input") is connected to the engine and brings in hot, polluted fumes from the engine's cylinders (where the fuel burns and produces power).
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