SCR Catalysts
SCR catalysts (Selective Catalytic Reduction catalysts) are key components in modern diesel emissions systems. These catalysts work with diesel exhaust fluid (DEF) to convert harmful nitrogen oxide (NOx) emissions into harmless nitrogen and water vapor. Advanced Truck Parts supplies SCR catalysts for Cummins, Detroit Diesel, Paccar, Volvo, Mack and other heavy-duty diesel truck platforms.
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What an SCR Catalyst Does
The SCR catalyst is located in the exhaust aftertreatment system and works together with the DEF dosing system. When diesel exhaust fluid is injected into the exhaust stream, the catalyst helps convert nitrogen oxide emissions into nitrogen and water vapor, significantly reducing harmful emissions from diesel engines.
Common Engines Using SCR Systems
- Cummins ISX, X15 and ISB 6.7 engines
- Detroit Diesel DD13, DD15 and DD16 engines
- Paccar MX-13 and MX-11 engines
- Volvo D11, D13 and D16 engines
- Mack MP7, MP8 and MP10 engines
- International A26 and MaxxForce engines
- Hino J08 and A09 engines
Common Signs of SCR Catalyst Problems
- SCR efficiency fault codes
- NOx conversion efficiency faults
- Engine derate conditions
- Emissions warning lights
- Poor emissions system performance
Verify Fitment Before Ordering
SCR catalysts are specific to the truck manufacturer, engine platform, and emissions system configuration. To confirm compatibility provide:
- Engine serial number
- Current SCR catalyst part number
- Truck VIN number
- Year / Make / Model of truck
- Photos of the catalyst tag if available
Why Buy SCR Catalysts from Advanced Truck Parts?
- Fitment verification before purchase
- Competitive pricing on heavy-duty emissions components
- Fast nationwide shipping
- Business account discounts available
- Trusted U.S.-based commercial truck parts supplier
