Fuel Pressure Regulator Kit Ford F-Super Duty 6.0 ALL 3C3Z-9T517-AG 3C3Z9T517AG with High Flow Intake Elbow for 2003-2007 F250 F350 F450 F550 Excursion Includes Upgrade FPR Spring and kit plus High Flow Intake Elbow Includes FPR and Intake Elbow Gaskets Dual threaded ports for boost guage / NOS injection ***03/04 models require butterfly valve under oem intake elbow to be removed for installation of high flow intake elbow