Motorcraft Engine Coolant Thermostat RT-1231 Fits select: 2011-2021 FORD F250, 2011-2021 FORD F350

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. 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 fit in the engine housing. Stroke-tested, heat-tested, pressure-tested and endurance-tested in real-world conditions to 10-year/150,000 miles equivalent. Motorcraft Thermostats are designed to exacting Ford Original Equipment specifications to maintain recommended coolant temperature for optimal engine temperature and heater performance. Vehicle Linkages Medium/Heavy Truck Ford F-450 Super Duty: 2011 - 2019 F-550 Super Duty: 2011 - 2019 F650: 2016 - 2019, 2021 F750: 2016 - 2019, 2021 Car/Truck Ford F-250 Super Duty: 2011 - 2021 F-350 Super Duty: 2011 - 2021 Mustang: 2020
Engine Coolant Thermostat

Fits Select:
2011-2021 FORD F250 8 Cyl 6.7 L
2011-2021 FORD F350 8 Cyl 6.7 L
2011-2021 FORD F450 8 Cyl 6.7 L
2020-2021 FORD MUSTANG 8 Cyl 5.2 L