Diesel Particulate Filters (DPFs) are a cornerstone of modern emissions control systems, designed to trap and reduce soot and fine particulates from exhaust gases. The Cummins B6.7 / L9 DPF Filter (2018–2022, OEM 5579377RX) is built to meet original equipment specifications, delivering dependable filtration performance for Cummins B6.7 and L9 engines. Installing the correct OEM filter helps maintain engine efficiency, support emissions compliance, and promote longer component life.
This DPF filter contributes to improved emissions control and engine performance — here’s why it matters:
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Captures Harmful Particulates – Effectively traps soot and solid particles from the exhaust stream, helping reduce environmental pollutants.
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Supports Regeneration Processes – A properly functioning DPF helps the system burn off trapped soot during regeneration, keeping the filter performing at its best.
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Helps Maintain Engine Efficiency – By stabilizing exhaust flow and reducing excessive backpressure, the filter supports smoother engine operation and consistent power delivery.
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OEM-Grade Fit and Durability – As OEM 5579377RX, this DPF is engineered to match original manufacturer specifications for fit, filter media design, and long-lasting performance.
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Prevents Exhaust-Related Issues – Replacing a clogged or worn filter helps avoid symptoms such as reduced power, increased fuel consumption, excessive smoke, and emissions system warnings.
A worn or blocked DPF can compromise both emissions performance and overall engine efficiency. The Cummins B6.7 / L9 DPF Filter (OEM 5579377RX) delivers the OEM-standard quality and filtration capability needed to keep your emissions system functioning smoothly and your engine running cleaner. For customers seeking a reliable replacement part, Tamerx offers high-quality components engineered to support long-lasting emissions control and dependable engine health.



















