Verified Retrofit Devices

Most gasoline-fueled vehicles have control technologies like catalytic converters that reduce harmful emissions of air pollutants. Diesel vehicles do not currently have these emission controls, so add-on “retrofits” have been developed that can be installed on the tailpipe of your existing diesel vehicles. These include diesel particulate filters (DPFs), diesel oxidation catalysts (DOCs) and others that are attached at the tailpipe to filter pollutants. School buses are required to install another technology called a closed crankcase system (similar to a PCV valve on cars) that is installed on the engine crankcase.  The closed crankcase ventilation system prevents diesel exhaust from seeping into the cabin of the school bus and therefore reduces children’s exposure to the harmful pollutants.

Regulated Vehicle owners may conduct general research on the CARB or USEPA websites at http://www.arb.ca.gov/diesel/verdev/vt/cvt.htm and http://epa.gov/cleandiesel/verification/verif-list.htm to determine which authorized installer should be contacted initially. It is the responsibility of the fleet owner to consult with the authorized installers to determine the appropriate BART device based on the regulatory minimum BART. The vehicle owner and the authorized installer(s) should evaluate operational needs when determining the best BART retrofit device for each vehicle.  Additional information can also be obtained by reviewing information for the verified products.  The EPA and CARB sites may contain more products than those listed on the State Contract.  Only those retrofit devices and authorized installers listed on the State Contract may be used for compliance with the Diesel Retrofit Program rules.

Click here for a list of the authorized installers and their retrofits.