57 Series FIPK Air Intake System2003-2005 Excursion 6.0L2003-2007 F-250/F-350/F-450/F-550 SuperDuty 6.0L+ 15.53 HP increaseStreet Legal In All US States-CARB EO Number: D-269-34 Designed To Increase Power 10Million Mile WarrantyReduces Intake RestrictionEasy To InstallReusable/WashableLong Lasting Performance.