Alliant Power AP63413 Replacement Injector HarnessReplacement new under valve cover injector harness pigtail or valve cover gasket harness. This is a 7.3 Powerstroke OEM quality Alliant power new replacement harness kit. One harness is needed for each valve cover. A bad 7.3 injector harness can lead to engine misfire and poor performance. After the harness ages the wire become brittle and need to be replaced.Alliant Power serves diesel aftermarket by providing you with high quality OEM replacement parts for your Ford Powerstroke, Dodge Cummins & GM Duramax. Many prefer OEM parts because they want first time fit." This is why Alliant builds their parts to OEM specifications and testing. It takes engineering, production control and quality assurance to provide reliable fit and function 100% of the time. Alliant helps keep Original Equipment Manufacturer (OEM) product as the preferred service part so vehicles and equipment continue to perform like new and provide you with greater ownership satisfaction.