The Selective Catalytic Reduction (SCR) filter is a crucial part of the emissions system on Cummins X15 and QSX15 engines from 2011 to 2020. It works with the SCR system to reduce harmful nitrogen oxide (NOx) pollutants in the exhaust, helping engines meet emissions standards and maintain efficient exhaust performance. When the SCR filter becomes worn or restricted, emissions effectiveness can decline and fault codes may arise. The Cummins X15, QSX15 SCR Filter OEM 4377767 from Tamerx Diesel Parts is engineered to match original equipment specifications, offering a dependable replacement to help keep your emissions system functioning as intended.
• Effectively reduces NOx emissions by enabling the SCR system to convert nitrogen oxides into harmless
nitrogen and water vapor, supporting cleaner exhaust output and regulatory compliance
• Designed for Cummins X15 & QSX15 engines (2011–2020) ensuring correct fitment, proper installation,
and seamless integration with the factory exhaust and SCR system
• Supports stable exhaust flow by maintaining proper movement of exhaust gases through the SCR system,
helping downstream emissions components operate efficiently
• OEM-grade construction (4377767) providing dependable durability, consistent performance, and
compatibility with original SCR hardware
• Ideal for highway and heavy-duty use where sustained emissions control and reliable SCR operation are
essential for long-term engine reliability
Replacing a worn or failing SCR filter with the Cummins X15, QSX15 SCR Filter OEM 4377767 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 operating conditions.









































