The Selective Catalytic Reduction (SCR) filter is a key component of the emissions system on Cummins QSB 6.7L engines from 2011 to 2018. Working within the SCR framework, this filter helps reduce nitrogen oxide (NOx) emissions in the exhaust, contributing to cleaner output and helping your engine meet environmental standards. When the SCR filter becomes worn or restricted over time, emissions performance can decline and fault codes may occur. The Cummins QSB 6.7L SCR Filter OEM 4387680 from Tamerx Diesel Parts is engineered to meet original equipment specifications, offering a reliable replacement to support efficient emissions control.
• Reduces NOx emissions effectively by enabling the SCR system to convert nitrogen oxides into harmless
nitrogen and water vapor, supporting cleaner exhaust output and helping maintain emissions compliance
• Designed for Cummins QSB 6.7L engines (2011–2018) ensuring proper fitment, correct installation,
and seamless integration with the factory exhaust and SCR system
• Supports stable exhaust flow by maintaining proper movement of gases through the SCR system,
helping downstream emissions components work efficiently
• Built to OEM standards (4387680) providing 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
key for long-term engine reliability
Replacing a worn or failing SCR filter with the Cummins QSB 6.7L SCR Filter OEM 4387680 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 across varied driving conditions.
































