The Industrial Injection II901-R4 Hybrid 285cc 75% Fuel Injector is a high-quality, aftermarket injector that is designed to fit 2003-2007 6.0 Powerstroke engines. This injector features OE factory machined solid body construction with no welding or plugs, which eliminates the potential for failure from check ball pressure issues. The 100% new precision fit, upgraded spool valves provide enhanced durability and performance, while the new harness connector ensures a reliable connection. The vented slot coil technology provides superior fuel atomization and combustion, and the new plungers and nozzle assembly ensure precise fuel delivery. The copper washer and injector o-ring kits are also included for easy installation.