The SureFlo Performance Sending Unit from Fleece Performance is a drop-in replacement designed for 1999-2007 Ford F-250/F-350 trucks with 7.3L and 6.0L Powerstroke engines. This unit is ideal for repairing a malfunctioning fuel level sender or running custom fuel lines directly to the tank. Unlike factory fuel senders that rely solely on a pickup tube, the SureFlo draws fuel from and returns fuel to the bucket assembly at the base of the unit, ensuring consistent fuel delivery and eliminating ¼ tank issues.