Unlike other remanufactured injectors, Sinister Diesel's new high performance injectors for the 2003-2007 Ford Powerstroke feature all new parts from the nozzle to the connector. New parts boost performance by improving injector response rate and cold weather start-up. Built on a re-manned body to save truck owners money, Sinister’s injectors work as stock replacements and also work with tuned, upgraded trucks. The injectors feature new injector coils; new harness assemblies; a new electrical connector; and a new, redesigned spool valve to help prevent stiction. They’re also etched with Sinister’s logo and come with a 24 month, unlimited mileage warranty.