Genuine Volvo/Mack 20940438 discharge recirculation valve (DRV) used in the EGR / charge-air recirculation circuit on Mack MP8 and Volvo D13 engines. The DRV regulates exhaust-gas flow back into the intake stream to control combustion temperature and meet EPA emissions limits. Specifications Manufacturer Volvo / Mack (Genuine OEM) Part Number 20940438 Part Type Discharge Recirculation Valve (DRV) System EGR / Exhaust Gas Recirculation Connector Reference 20948160 (mating connector) Cross References This discharge recirculation valve is referenced in the following platforms: Volvo / Mack: 20940438 Applications This discharge recirculation valve fits the following Volvo / Mack engines: Mack MP8 (EGR circuit) Volvo D13 (EGR circuit) Verify your engine emissions calibration year and DRV mounting before ordering. The 20940438 is one of several recirculation-circuit components on these engines; compare to the existing valve and connector before installation.