SCR Components: Selective Catalytic Reduction Parts

Selective catalytic reduction, or SCR, is the system that injects diesel exhaust fluid into your exhaust stream and passes it over a catalyst to convert nitrogen oxides into harmless nitrogen and water vapor before the exhaust leaves the vehicle. When a component in that chain degrades, the failure tends to show up as a fault code first, followed quickly by a power derate if left unaddressed on most heavy-duty platforms.

CBT Auto Parts stocks SCR components within our Exhaust & Emission Control Parts range, including Cummins SCR and Scania SCR applications built for commercial diesel platforms, each checked against OEM specifications before listing. Every SCR catalyst connects correctly into the broader emissions system alongside your DPF and DEF injection components, with fitment data matched to your exact engine and fast nationwide shipping to fleet and owner-operator addresses alike.