Diesel engines equipped with modern emissions systems use several aftertreatment components to process exhaust gases before they leave the vehicle. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418545 is designed as part of the Selective Catalytic Reduction (SCR) system used on Cummins B6.7 and L9 engines. This SCR catalyst helps reduce nitrogen oxide (NOx) emissions by enabling a chemical reaction between exhaust gases and Diesel Exhaust Fluid within the exhaust system.
-
The Cummins B6.7 / L9 SCR OEM 5418545 operates as a catalyst module located in the later stage of the diesel aftertreatment system.
-
Diesel Exhaust Fluid (DEF) is injected into the exhaust stream before the gases enter the SCR catalyst.
-
Inside the SCR unit, DEF reacts with nitrogen oxide emissions and converts them into nitrogen and water vapor.
-
The SCR module works together with other emissions components such as the diesel oxidation catalyst (DOC) and diesel particulate filter (DPF).
-
OEM 5418545 is designed for Cummins B6.7 and L9 engines manufactured between 2018 and 2021, matching the original exhaust system configuration.
-
The catalyst housing is built to withstand high exhaust temperatures and continuous exposure to exhaust gases.
Proper exhaust treatment depends on the coordination of multiple aftertreatment components within the emissions system. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418545 is engineered to integrate with the factory aftertreatment setup and support effective reduction of NOx emissions. Customers looking for dependable replacement emissions components can find this SCR assembly available from Tamerx Diesel Parts.

















































