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Ford Heater Core Flow Restrictor (79-04 All)

Market Price $23.99 You Save 17% ($4.00)
Our Price

$19.99

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  • Item 384064
  • MPN# XR3Z18599AA

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Features & Details

  • Heater Core Flow Restrictor
  • Original Factory Equipment - OE Fit and Finish
  • Genuine Ford OEM Part - XR3Z18599AA
  • Plastic Construction
  • Sold Individually
  • Fits All 1979-2004 Mustangs
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.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Heater Core Flow Restrictor
Installation Info
Tech Specs
Will it fit my Mustang?
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Cobra - 93, 94, 95, 96, 97, 98, 99, 01, 03, 04
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • Bullitt - 01
  • Mach 1 - 03, 04

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
It works

You never want to do this repair twice!! I installed on a 1st model year 87 that came stock without it. Its definately one of the parts that Ford forgot

Helpful (2)

5/5
Does it's job

Already had to switch out two heater cores for premature failure. This restrictor helps slow down the flow of coolant to the heater core. Does what it's supposed to do, no issues so far. Recommended for ...

Read More
Helpful (2)

Overall Rating 5 out of 5 stars
Read All 3 Reviews

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1 Questions / 1 Answers

Ask a Question

I'm guessing this is fitted inside of the inlet hose going into the core, is there are OD measurement on it?

Bret3

  • The Ford Heater Core Flow Restrictor (79-04 All) will be located in the inlet hose which connects to the core. The measurement of this piece will be the same as the factory measurement as it is a genuine OEM part.

    KevinD92

Helpful (0)

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Customer Reviews (3) Write a Review

Overall Rating 5.0

out of 5 stars




  • 5/5

    January 10, 2017

    It works

    You never want to do this repair twice!! I installed on a 1st model year 87 that came stock without it. Its definately one of the parts that Ford forgot

    Chad1140

    Year: 1987 Submodel: GT

    Helpful (2)

  • 5/5

    December 20, 2016

    Does it's job

    Already had to switch out two heater cores for premature failure. This restrictor helps slow down the flow of coolant to the heater core. Does what it's supposed to do, no issues so far. Recommended for anyone having heater core issues.

    Mustang72

    Year: 2001 Submodel: GT

    Helpful (2)

  • 5/5

    April 15, 2016

    MORE important than you think!

    This Heater Core Flow Restrictor was sold for years, in the old Ford Motorsport catalogs... They were used in Ford Police vehicles for many years. What does it do?? It lowers the pressure of the coolant going into the Heater Core. Why do you need one? Have you EVER replaced the heater core on a Fox or SN-95 Mustang? BIG, messy, knuckle busting job!! THIS little part does a lot to SAVE your Heater Core! I've never run without one, and have never had to replace a Heater Core! ;)

    QuickSixxer

    Year: 1998 Submodel: GT

    Helpful (1)

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