The McCormick 6673157A3 AdBlue System is a genuine OEM component designed for specific McCormick agricultural machinery. This system is crucial for modern diesel engines, facilitating the reduction of nitrogen oxide (NOx) emissions through Selective Catalytic Reduction (SCR) technology. It ensures compliance with environmental regulations and maintains the engine's efficiency and longevity. The system includes components necessary for the storage, dosing, and injection of AdBlue (Diesel Exhaust Fluid) into the exhaust stream.