Coolant Filtration System for 2003, 2004, 2005, 2006, 2007 F-250, F-350, F-450, F-550 Ford 6.0L SuperDuty Trucks (FCF1) Machined Cooling Fins, NOT Anodized (For Better Heat Transfer) Detailed Instructions Included Use replacement Coolant Filters Only Disposable filters not covered under warranty