Used Core P Fuel Injection Pump fits Cummins Engine 0-403-466-156 (39256881). This part is a. And there is no guarantee this part is operational in the current condition. Ensure compatibility before purchasing. Goldfarb & Associates specialize in diesel injection pumps, injectors and turbochargers. We deal in used, remanufactured, and new parts for truck, automotive, agricultural, construction and industrial markets. We supply diesel engine parts for Caterpillar, Cummins, Detroit Diesel, Ford, Perkins, John Deere, International, Mercedes, and many more engine applications.