6.7L Cummins Exhaust System – Aftertreatment System – General Information

Due to the number of exhaust aftertreatment applications, this procedure has been written to be generic. Illustrations within this procedure will not represent all applications.
The aftertreatment system is composed of four sections.
These sections are:
โ€ข Inlet
โ€ข Aftermarket diesel oxidation catalyst
โ€ข Aftertreatment diesel particulate filter
โ€ข Outlet
NOTE: In some applications, the aftertreatment diesel oxidation catalyst can be integrated into the inlet of the
exhaust aftertreatment system.