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Diesel Particulate Filters.

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Diesel Emission Control RETROFIT Solutions for North America.


Johnson Matthey is equipped with a complete line of emission control aftertreatment technologies, which reduce EPA and CARB-regulated pollutants to make our air healthier to breathe and improve our environment.

Johnson Matthey has a full range of 2-way, 3-Way, and 4-way technologies which reduce Hydrocarbons (HC), Carbon Monoxide (CO), Particulate Matter (PM) and Nitrogen Oxides (NOx).

Johnson Matthey is the leading supplier of emission control aftertreatment systems to the North American market, and the global leader in the emission control industry for over 40 years. Johnson Matthey’s HDD-NA Group works exclusively on mobile heavy duty diesel applications to ensure we have the right tools for this dynamic marketplace.
Johnson Metthey Retrofit

Our technologies are available to retrofit a full range of diesel applications including:


  • School Buses

  • Urban Transit Buses

  • Sanitation Trucks

  • Municipal Vehicles

  • Private Fleets

  • Over-The-Road Trucks


  • Construction

  • Marine

retrofit devices

Donaldson Retrofit Engine Control Systems DPF ESW Group Retrofits Johnson Matthey Catalysts Hug Filter Systems DCL International Retrofit

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