SET OF TWO: Muzzys 800-418 UPGRADED Nylon Heater Core Connectors with Clamps for 3/4" Heater Core Inlets and Outlets and 3/4" Hoses. Replace your old cracked, broken, and leaky heater core connectors with these UPGRADED stronger than OEM Nylon connectors. See product description below for a list of known vehicles this fits. This is not a complete list. This will fit ANY vehicle that uses a 3/4" heater core line and a 3/4" hose. Replaces the following part numbers: Dorman 800-418, 4215; 905-006; XC2Z-18B402-DA Install: It is recommended to use a heater hose disconnect tool to remove the old connector from the firewall. When installing the new fitting it will be a tight fit by design, it is recommended to use some soapy water to help slide the new fitting onto the heater core tube and make sure to keep pushing it until you hear or feel a "click". Be sure to clean all the crud off the heater core tubes before installing the new fitting. Secure the heater hose with the included clamp. FITS THE FOLLOWING VEHICLES AND MANY MORE: [Ford Expedition: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017] - [Ford F-250 Super Duty: 2011, 2012, 2013, 2014, 2015, 2016] - [Ford F-350 Super Duty: 2011, 2012, 2013, 2014, 2015, 2016] - [Ford F-450 Super Duty: 2011, 2012, 2013, 2014, 2015, 2016] - [Ford F-550 Super Duty: 2011, 2012, 2013, 2014, 2015, 2016] - [Ford F650: 2016, 2017] - [Ford F750: 2016, 2017] - [Ford Mustang: 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010] - [Lincoln LS: 2003, 2004, 2005, 2006] - [Lincoln Navigator: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017]