Keeping your diesel truck’s emission system running correctly is essential for staying compliant with today’s strict environmental regulations. The Cummins B6.7 SCR 2018–2021: OEM 5418555 is a critical component in the Selective Catalytic Reduction (SCR) system, designed to reduce harmful nitrogen oxides (NOx) in your exhaust. Understanding how this SCR unit supports cleaner operation can help you make informed maintenance decisions and protect your truck’s emission aftertreatment system.
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Engineered specifically for Cummins B6.7 engines from 2018 to 2021, the OEM 5418555 SCR unit fits seamlessly into the emission aftertreatment assembly for dependable integration.
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The SCR (Selective Catalytic Reduction) system works by introducing diesel exhaust fluid (DEF) into the exhaust stream, where a chemical reaction converts NOx into harmless nitrogen and water vapor.
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Choosing the genuine OEM 5418555 SCR ensures compatibility with your engine’s emission management system, reducing the risk of fitment issues and diagnostic trouble codes associated with inferior parts.
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A properly functioning SCR helps maintain accurate DEF dosing, which supports effective NOx reduction and minimizes unnecessary DEF waste.
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Replacing worn or malfunctioning SCR components with the correct OEM part helps prevent emission faults, warning lights, and potential downtime due to emission-related issues.
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Manufactured to Cummins’ exact specifications, this SCR module offers durable construction capable of withstanding heat and vibration from daily highway and regional trucking use.
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Installation is straightforward, making it a practical choice for service technicians and fleet maintenance professionals during emission system servicing or repairs.
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Using the right SCR component plays a key role in helping your truck stay compliant with emission standards while supporting cleaner operation and peace of mind.
Choosing the Cummins B6.7 SCR 2018–2021: OEM 5418555 from Tamerx Diesel Parts means equipping your emission system with a quality, engine-specific component engineered for reliability. Timely SCR replacement and proper maintenance help ensure your truck remains emission-compliant and ready for the road ahead.





































