Modern diesel trucks rely on advanced aftertreatment systems to stay compliant, efficient, and dependable on the road. One of the most important parts of that system is the Selective Catalytic Reduction (SCR) assembly, which plays a central role in reducing harmful emissions. For Cummins B6.7 engines built from 2018 through 2024, the Cummins B6.7 SCR 2018–2024: OEM 4394891 delivers a direct-fit, reliable solution for maintaining proper exhaust emissions control and keeping your engine operating cleanly and effectively.
• The SCR (Selective Catalytic Reduction) assembly is designed to lower nitrogen oxide (NOx) emissions, transforming them into nitrogen
and water to help your truck meet EPA emissions standards and environmental requirements.
• The OEM 4394891 SCR component is engineered specifically for Cummins B6.7 engines from 2018 to 2024,
ensuring accurate fitment and dependable compatibility with factory aftertreatment systems.
• Working in conjunction with your DEF dosing system, this SCR assembly supports effective exhaust treatment,
helping optimize DEF usage and maintain balanced emissions processing throughout operation.
• Choosing the correct OEM SCR unit helps prevent emissions warning lights, fault codes, and derate conditions that can cause
unexpected downtime or costly repairs.
• A properly functioning SCR system supports long-term reliability by minimizing emissions buildup and protecting other
aftertreatment components from unnecessary wear and stress.
• Installing an OEM-quality replacement like the Cummins B6.7 SCR 2018–2024: OEM 4394891 gives you confidence in durability,
correct system integration, and dependable performance under demanding conditions.
When maintaining your Cummins B6.7 emissions system, selecting the right SCR component is essential for clean operation and regulatory compliance. The OEM 4394891 SCR assembly is a trusted solution that helps restore effective emissions control and keeps your truck performing at its best. At Tamerx Diesel Parts, we offer quality components to help you reduce downtime and stay focused on the road ahead.





























