Controlling exhaust emissions requires a properly functioning aftertreatment system that can process gases produced during diesel combustion. The Cummins L9, B6.7 SCR 2018–2024: OEM 5418654 is a Selective Catalytic Reduction (SCR) assembly designed for Cummins L9 and B6.7 engines. Installed in the exhaust pathway, this component helps convert nitrogen oxide gases into less harmful compounds through a catalytic chemical reaction.
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Designed for Cummins L9 and B6.7 engines from 2018 to 2024, the OEM 5418654 SCR fits directly into the factory exhaust aftertreatment system.
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The SCR catalyst chamber allows diesel exhaust fluid to react with nitrogen oxide emissions inside the exhaust stream.
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As exhaust gases pass through the catalyst structure, chemical reactions convert harmful NOx gases into nitrogen and water vapor.
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The catalyst substrate provides a large internal surface area that supports efficient exhaust gas treatment.
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A properly functioning OEM 5418654 SCR unit helps maintain stable emission readings from NOx sensors placed before and after the catalyst.
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Correct SCR operation supports coordination between the DEF dosing system and the exhaust aftertreatment components.
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The catalyst housing is designed to tolerate high exhaust temperatures and continuous heavy-duty driving conditions.
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Replacing a worn or restricted SCR assembly can help restore proper exhaust treatment and consistent aftertreatment operation.
The Cummins L9, B6.7 SCR 2018–2024: OEM 5418654 available from Tamerx Diesel Parts provides a reliable replacement option for maintaining emission system efficiency. With the correct SCR assembly installed, the aftertreatment system can continue processing exhaust gases effectively while supporting dependable engine operation.


















































