The fuel injection pump 2643B317 is a very complex piece of engineering. Each one is calibrated to deliver just the right quantity of diesel fuel via the fuel injector into the combustion chamber. To achieve this precision we carefully select, design and test the performance of each pump for thousands of hours to ensure your engine delivers the precise fuel delivery for maximum power output and optimum fuel efficiency and contributes to meeting the emissions level. Because fuel injection pumps operate thousands of times a minute, ensuring their reliability is a key challenge for any supplier and our genuine pumps are backed by our 12-month warranty.