Diesel Particulate Filters (DPF) are a critical component of modern emissions systems, capturing and reducing soot and particulate matter from exhaust gases. The Cummins B6.7 / L9 DPF Filter (2018–2022, OEM 5579371RX) is engineered to meet original specifications, providing dependable filtration for Cummins B6.7 and L9 engines. Using the correct OEM filter helps maintain engine efficiency, extend emissions system life, and support cleaner exhaust output.
This DPF filter plays a key role in overall emissions control — here’s why it matters:
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Captures Harmful Particulates – Traps soot and other solid particles from the exhaust stream, helping reduce airborne pollutants.
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Supports Regeneration Efficiency – An effective DPF helps the system regenerate properly, burning off accumulated soot and maintaining consistent filter performance.
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Helps Maintain Engine Efficiency – By keeping exhaust flow stable and reducing excessive backpressure, the filter helps the engine operate smoothly and efficiently.
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OEM-Grade Fit and Durability – As OEM 5579371RX, this DPF matches original manufacturer specifications for size, media design, and long-lasting performance.
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Prevents Exhaust-Related Issues – Replacing a clogged or worn filter helps avoid reduced power, increased fuel consumption, excessive smoke, or system fault codes.
A worn or blocked DPF filter can lead to reduced engine performance, higher emissions, and potential maintenance issues. The Cummins B6.7 / L9 DPF Filter (OEM 5579371RX) delivers the reliable, OEM-standard filtration needed to keep your emissions system operating efficiently and your engine running cleanly. For customers seeking a trusted replacement part, Tamerx offers high-quality components engineered to support long-lasting emissions performance and dependable engine health.



















