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Ford Intake Manifold to Head Gasket; Driver Side (99-04 GT)

Item 402179
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$28.88 (each)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Intake Manifold to Head Gasket Seal
      • Original Factory Equipment - OE Fit and Finish
      • Genuine Ford OEM Part - YL3Z-9439-BA
      • Left Hand - Driver Side
      • Sold Individually
      • Fits All 1999-2004 Ford Mustang GT Models


      Reliable Performance. If you have a pesky leak in your Mustang’s intake manifold, then Ford has the ideal product for you. The Ford Intake Manifold to Head Gasket - Driver Side replaces the worn or torn intake to the head gasket.

      Superior Built. This intake manifold is a genuine Ford OEM replacement; therefore, it will be a perfect OE fit and finish for vehicle.

      Unrivaled Quality. Made in the USA, this heavy-duty construction will stop leaks and give you reliable performance for miles and miles. For your convenience, this intake manifold to head gasket is sold individually.

      Installation. This product is an intermediate installation that will require common garage tools for completion. The installation time is approximately 3 hours.

      Warranty. Ford backs this product with a 24 Month Limited Warranty that will cover in full any defect or flaw found in the materials or craftsmanship.

      Application. The Ford Intake Manifold to Head Gasket for the Driver Side fits all 1999-2004 Ford Mustang GT models.

      Fitment: 1999 2000 2001 2002 2003 2004 Details

      MPN# YL3Z-9439-BA

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (12)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 12 customers

      • November 13, 2019

        5 2001 GT - BobbyMac

        fits perfectly and performs very well

        The gasket is high quality and easy to install. I've had it on for months now and still running strong as expected.

        Helpful (0)
      • September 18, 2019

        5 2000 GT - Jeff2000GT

        Perfect fit

        Great quality, perfect fit. Made manifold install that much easier!

        Helpful (0)
      • August 10, 2019

        5 2002 GT - Yankee

        Great product

        These Ford performance gaskets are a great product one was on backorder for two weeks and I still waited just because I knew they would seal the first time and of course they did and no problems love the products

        Helpful (0)
      • July 11, 2019

        5 2003 GT - Q6steeda

        Worked perfectly

        Right side was marked and they had a tab on them so you couldn't put them on backwards or upside down .

        Helpful (0)
      • June 12, 2019

        5 2000 GT - 098765


        Ford intake to head gasket fit perfect always go with a new seal make the difference don't re use the old one

        Helpful (0)
      • April 28, 2019

        5 2004 GT - Terminator9904

        Good gaskets for aluminum typhoon intake

        Perfect fit no leaks so far on my 04 2valve with typhoon manifold

        Helpful (0)
      • April 13, 2019

        5 1999 GT - PeteyV

        Perfect fit no air leaks!

        Took care of my coolant leaks with a brand new intake manifold and gasket set thank you American Muscle!

        Helpful (1)
      • February 26, 2019

        5 2000 GT - TerryW

        Works Great !

        They came on time and fit and works likes its supposed to great product !

        Helpful (1)
      • January 24, 2019

        5 2003 GT - CharlesA

        intake gasket

        fast delivery and perfect fit the torques on the PDF file aren't correct

        Helpful (2)
      • January 09, 2019

        5 2001 GT - Michael

        Work great!

        Fit perfect no issues at all! Worked great as it should be.

        Helpful (3)

      Questions & Answers (4 answers)

      4 Top Rated Questions

      Why is the passenger side separate? If you replace one you are going to have to replace the other.

      Can I purchase two of these “driver side head gaskets” and use them for both the passenger and driver side? Basically aren’t they the exact same.

      • This would only fit on the driver side since they are designed for one side and each side is different from each other.

      Helpful (0)

      Will this gasket work on the Edelbrock Victor Jr. EFI Intake Manifold (99-04 GT)? Item#: 56505

      • Unfortunately, we have not yet test fit to work with the Edelbrock Victor Jr. EFI Intake Manifold at this point in time.

      Helpful (0)

      Will these gaskets work with the Professional Products Typhoon Intake?

      • The Professional Products Typhoon Intake will require the Professional Products Typhoon Intake Manifold Gaskets. Here is the link for those gaskets:

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Intake Manifold To Head Gasket -Driver Side
      • (1) Installation Instructions

      Will It Fit My Mustang

      • Bullitt - 01
      • GT - 99, 00, 01, 02, 03, 04

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