Kit includes: Replaces Ford part number BC3Z-8590-F (1) smaller O-ring used in the Ford part number DR3Z8566A T-CONNECTOR - Quantity (2) larger O-rings used on upper and lower radiator hose quick connectors.
Coolant quick connectors that Ford used on vehicles such as the F-150 are notorious for developing leaks over time, especially in cold weather. The upper and lower radiator hoses on many F-150s use part number BC3Z-8590-F.
There is a smaller quick connector on the coolant T-connector that joins the upper radiator hose with the thermostat and water pump. The T-connector is part number DR3Z8566A. It contains an O-ring that is replaceable, but not available from Ford Parts; it is included in this kit..
These Parts are used in many Ford Trucks and Cars including F150 Mustang.