DPF vs. Catalytic Converter: What Is the Difference?

Modern vehicles use different exhaust aftertreatment components to reduce pollutants and particulate matter from engine exhaust gases. Two of the most commonly discussed components are the Diesel Particulate Filter (DPF) and the catalytic converter.

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Although both are installed in automotive exhaust systems, they have different structures, functions and applications.

A DPF is mainly designed to capture particulate matter (PM) from diesel exhaust, while a catalytic converter uses catalytic reactions to convert certain harmful gases into less harmful compounds.

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Understanding the difference between these components can help vehicle owners, distributors, repair shops and aftermarket parts buyers select the right exhaust component for their application.