The Selective Catalytic Reduction (SCR) filter plays a critical role in lowering harmful nitrogen oxides (NOx) in the exhaust of Cummins QSL 8.9L engines from 2011 to 2018. As part of the SCR emissions system, this filter helps convert NOx into less harmful compounds, supporting cleaner exhaust output and helping your engine meet emissions standards. Over time, SCR filters can become worn or restricted, which may reduce emissions system effectiveness and trigger fault codes. The Cummins QSL 8.9L SCR Filter OEM 4328947 from Tamerx Diesel Parts is designed to meet original equipment specifications, making it a reliable replacement for maintaining optimal emissions control.
• Reduces NOx emissions efficiently by enabling the SCR system to convert nitrogen oxides into
harmless nitrogen and water vapor, contributing to cleaner exhaust and regulatory compliance
• Exact fit for Cummins QSL 8.9L engines (2011–2018) ensuring correct installation, seamless
integration, and dependable operation within the factory exhaust and SCR system
• Supports stable exhaust flow by maintaining proper gas movement through the SCR system,
helping downstream emission components operate efficiently
• OEM-grade construction (4328947) offering dependable durability, consistent performance, and
compatibility with original SCR hardware
• Ideal for highway and heavy-duty use where sustained emissions control and efficient SCR
operation are essential for long-term reliability
Replacing a worn or failing SCR filter with the Cummins QSL 8.9L SCR Filter OEM 4328947 from Tamerx Diesel Parts helps restore proper emissions treatment and supports the overall health of your exhaust system. Choosing a high-quality, OEM-matched SCR filter ensures your engine maintains efficient emissions performance and continues running reliably under varied driving conditions.








































