Reduce Coolant Pressure. A Heater Core Flow Restrictor as the name suggest restricts the flow of engine coolant to help reduce pressure and the chance of a premature heater core failure. Heater hose restrictors were featured as original factory equipment on 1996-2004 4.6L Mustangs and can be installed on 1979-1995 models for peace of mind.
Genuine Ford Part. This genuine Ford Heater Core Flow Restrictor is manufactured from OEM quality plastic material to the original factory specifications to ensure a perfect fit and reliable operation. Genuine Ford OEM part - XR3Z18599AA.
Application. Designed as a direct fit replacement, this genuine Ford Heater Core Flow Restrictor fits all 1979 to 2004 Ford Mustangs including the V6, LX 5.0, GT, Bullitt, Mach 1 and SVT Cobra models. Sold individually.
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