Modern diesel engines depend on advanced exhaust aftertreatment systems to reduce harmful emissions and meet environmental regulations. The Cummins B6.7, L9 SCR 2018–2021: OEM 5418652 is a Selective Catalytic Reduction (SCR) component designed to help reduce nitrogen oxide (NOx) emissions produced during diesel combustion. Positioned within the exhaust system, this SCR unit works together with diesel exhaust fluid (DEF) to convert harmful gases into safer compounds before they leave the vehicle.
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Designed for Cummins B6.7 and Cummins L9 engines from 2018 to 2021, the OEM 5418652 SCR fits properly within the factory emission aftertreatment system.
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Selective Catalytic Reduction technology works by injecting diesel exhaust fluid (DEF) into the exhaust stream where it reacts with nitrogen oxides.
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The SCR catalyst helps convert these NOx emissions into nitrogen and water vapor, reducing harmful pollutants released from the exhaust system.
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A properly functioning OEM 5418652 SCR unit supports stable emission system readings and balanced exhaust chemistry.
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Accurate SCR operation helps maintain the correct DEF dosing process required for consistent emission reduction.
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Installing the correct OEM SCR component helps reduce the likelihood of emission warning lights, diagnostic trouble codes, or system faults.
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Built to withstand high exhaust temperatures, the SCR catalyst structure is engineered for durability under heavy-duty operating conditions.
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Replacing a worn or restricted SCR assembly helps restore proper aftertreatment performance and maintain compliance with modern diesel emission standards.
Choosing the Cummins B6.7, L9 SCR 2018–2021: OEM 5418652 from Tamerx Diesel Parts helps ensure your emission system operates as designed. With the correct SCR unit installed, your engine can maintain cleaner exhaust output and dependable emission control for everyday driving.













































