Genuine Mack EGR Pipe Elbow

DESCRIPTION EGR Pipe Elbow CONDITION Used BRAND Mack Cross-reference note: Part number STP004119 is a matching cross-reference for our main listing part number NO NUMBER. Function of this partThe EGR (exhaust gas recirculation) system routes a controlled amount of exhaust gas back into the intake. This lowers combustion temperatures and helps reduce NOx emissions. Why this part mattersBecause EGR flow is monitored closely by the engine management system, issues with EGR valves or coolers quickly trigger fault codes and derates. Keeping the EGR system in good working order is key to reliability and emissions compliance. About the brandMack is known for building tough trucks and components for construction, vocational, and highway fleets that need reliable performance day after day. Fitment & usage Used OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment. Note: Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.