A fully functioning exhaust aftertreatment system is essential for diesel trucks to stay compliant, dependable, and trouble-free — and the Selective Catalytic Reduction (SCR) assembly is at the heart of that system. For Cummins X15 engines from 2018 through 2021, the Cummins X15 SCR 2018–2021: OEM 5418501 delivers a reliable, factory-matched solution to help control harmful emissions and maintain efficient exhaust processing in real-world operation.
• The SCR unit is designed to reduce nitrogen oxide (NOx) gases by converting them into nitrogen and water,
which helps your truck meet EPA emissions requirements while promoting cleaner exhaust output.
• The OEM 5418501 SCR assembly fits Cummins X15 engines built between 2018 and 2021,
ensuring direct compatibility with your truck’s original aftertreatment configuration.
• This component works in tandem with your DEF dosing system to support effective exhaust treatment,
helping maintain balanced SCR performance throughout varied driving conditions.
• Installing the correct OEM SCR helps reduce the likelihood of system warnings, fault codes, and emissions-related derates,
keeping your truck on the road and out of the shop.
• A well-maintained SCR system can help protect other aftertreatment parts by minimizing excess emissions buildup,
supporting longer component life and fewer unexpected repairs.
• Choosing an OEM replacement like the Cummins X15 SCR 2018–2021: OEM 5418501 gives you confidence in durability,
correct fit, and dependable emissions control performance you can rely on.
Selecting the right SCR component is one of the best ways to maintain your Cummins X15 emissions system and avoid unnecessary issues. The OEM 5418501 SCR assembly helps ensure effective NOx reduction and supports smoother, cleaner operation. At Tamerx Diesel Parts, we provide quality components to help keep your truck compliant and performing at its best.







































