The Bosch Fuel Injection Pump QSB 4.5 is a high-quality replacement part designed specifically for the Cummins diesel engine. With a brand name like Bosch, you can trust that this fuel injector pump will provide reliable performance. This product is not a vintage part, and it is not universally fitting, meaning it is tailored to fit the specific engine it was designed for. Made for diesel fuel, this Bosch fuel injection pump is a crucial component for maintaining the engine’s efficiency and power output. Came out of QSB 4.5, it is a reman pump that worked before removal. Pump with nut and washer included.