Backed by the Motorcraft Service Parts Warranty which offers 2 years unlimited mileage limited labor cost and no commercial exceptions. Warranty is supported nationwide by Ford/Lincoln dealers and Ford Authorized Distributors. The only parts recommended by Ford Motor Company for Ford Lincoln and Mercury vehicles. Designed to exacting Ford Original Equipment specifications to maintain recommended coolant temperature for optimal engine temperature and heater performance. Stainless steel or brass bridge and spring frame is channel-constructed for strength and rigidity. Tapered-end stainless steel pistons feature flexible elastomeric boots. Streamlined venturi nozzle for maximum coolant flow. Mounting flange is designed for an optimal thermostat fit in the engine housing. Stroke-tested heat-tested pressure-tested and endurance-tested in real-world conditions equivalent to 10-year/150 000 miles of in-vehicle performance for passenger car and light trucks Vehicle Linkages Medium/Heavy Truck Ford E-450 Super Duty: 2005 - 2013 F-450 Super Duty: 2008 - 2010 F-550 Super Duty: 2008 - 2010 Car/Truck Ford E-150: 2005 - 2013 E-250: 2005 - 2013 E-350 Super Duty: 2005 - 2013 Excursion: 2003 - 2005 F-250 Super Duty: 2003 - 2010 F-350 Super Duty: 2003 - 2010