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

Item 383850
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    Features & Details

    • Intake Manifold to Head Gasket Seal
    • Original Factory Equipment - OE Fit and Finish
    • Genuine Ford OEM Part - YL3Z9439A
    • Right Hand - Passenger Side
    • Sold Individually
    • Fits 1999 to 2004 2V 4.6L GT Mustangs
    Leak Free Performance. Whether you are installing a brand new intake manifold or just re-installing your factory intake, you will need high quality gaskets to prevent power robbing leaks. That is why AmericanMuscle offers brand new genuine Ford replacement gaskets.

    Genuine Ford Part. Made to the original factory specifications from OEM quality materials, this genuine Ford Intake Manifold to Head Gasket is the perfect replacement part for a factory correct installation. Genuine Ford OEM part - YL3Z9439A.

    Application. This genuine Ford Passenger Side Intake Manifold Gasket is designed for use on 1999 to 2004 GT Mustangs equipped with the 4.6L 2V SOHC Modular engine. Sold individually.

    Please Note. This Gasket will not work on the driver side. You'll need part # YL3Z-9439-BA.

    Fitment: 1999 2000 2001 2002 2003 2004 Details

    MPN# YL3Z9439A

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Right Hand - Passenger Side Intake Manifold to Head Gasket
    Installation Info
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (7)

        5 Top Rated Questions

        it looks like weak spot between the water outlets and exhaust ports on these gaskets.could this be a hard problem to have another bolt fixed in that spot?

        Will these fit the Professional Products Polished Typhoon Intake Manifold?

        • I would recommend using the Professional Products gasket set with their manifold.  Part number 20055 

        Helpful (0)

        I read the review saying this is the incorrect part for the 2001 Mustang Gt. Has anyone had any luck with this on their 01 GT? Did it fit and stop the leaking? I am looking to buy this soon, so please get back to me as soon as possible...Thanks!

        • This Ford Intake Manifold to Head Gasket will be correct for 2001 Mustangs.

        Helpful (0)

        Will these Ford gaskets work with the Victor Jr. intake?

        • The Ford Intake Manifold to Head Gasket will be compatible with the Edelbrock Victor Jr. EFI Intake Manifold.

        Helpful (0)

        Whats the difference between the passenger and drivers side? Im holding one of each and they appear to be 180* mirror images. Is there something we are missing?

        • The only difference would be the coolant cross over would be different on the passenger side which makes it slightly different then the right side.

        Helpful (0)
        Post Your Question
        2 More Questions
        Is this gasket only for the passenger side only or does this fit on both sides? Is there a part # for the driver side? 1 answer
        Does this also work as the driver side or would I have to buy a different product to replace the driver side too? 1 answer

          Customer Reviews (14) Write a Review

          Overall Rating 4.2

          out of 5 stars

          • 5/5

            July 12, 2019

            Best gaskets for 99-04 2Valve mustangs

            Always had a leak with the other gaskets and the professional products gaskets are like printed paper don’t waist money on those get the stock Ford oem gaskets and it seals the manifold 100 no more leaking especially if you want to install the typhoon manifold it took me about 30-40 min to swap everything including manifold


            Year: 2004 Submodel: GT

            Helpful (0)

          • 1/5

            April 03, 2019

            Wrong setup

            If you have a opr after market intake this will not work out 200 dollars on old intake that i purchased from a.m because they dont make seals individualy for the opr intake very upset about this


            Year: 2002 Submodel: GT

            Helpful (1)

          • 4/5

            March 12, 2019

            Not bad

            Not bad, could be better. I prefer the metal ones but this will work.


            Year: 2004 Submodel: GT

            Helpful (0)

          • 5/5

            January 19, 2019

            Original manifold cracked..

            Needed these for the replacement intake Manifold I had to replace due to the original cracking.. not one complaint... american muscle has always delivered great parts and customer service when my stang needs it..


            Year: 2001 Submodel: GT

            Helpful (1)

          • 5/5

            November 09, 2018

            Replacement intake manifold

            Everything went well took a real lot of time for cleanup


            Year: 1999 Submodel: GT

            Helpful (5)

          • 5/5

            September 05, 2018

            Perfect Fit

            Well i guess this is a common issue with the 4.6 because i had to wait a couple of weeks for the gasket to be re-stocked, but once i received it, i went right to the garage and installed it... it was the perfect fit... Thanks AM, Peaches runs so much better now PS. please order both sides...


            Year: 2002 Submodel: GT

            Helpful (5)

          • 5/5

            August 08, 2018

            1st Class

            Received and installed without any problems. Quality product made the installation of my new intake manifold very easy.


            Year: 2003 Submodel: GT

            Helpful (4)

          • 5/5

            July 31, 2018

            Good product

            Everything worked as expected now I just need it to last for a while only time will tell but satisfied with my purchase


            Year: 2000 Submodel: GT

            Helpful (5)

          • 4/5

            July 09, 2018

            Works great and perfect fit

            Works great so far and fits my 2004 GT perfectly! Absolutely expensive, especially as you need two of these (@ $40 a pop) but it's worth it for quality!


            Year: 2004 Submodel: GT

            Helpful (6)

          • 1/5

            October 05, 2017

            Not the correct part for 01.

            Bought this for my wife's 01 when I replaced the intake. It should have two holes in the end for the bolts but only has one. Ended up finding the correct set at Auto shop for 19.99. If you're looking for an 01 don't waste your money this product won't work and is priced too high as well.


            Year: 2001 Submodel: GT

            Helpful (11)

          • 5/5

            August 05, 2016

            Ford Intake Manifold to Head Gaskets

            You really can't get a better quality gasket than this. They are very well made and a high quality product. I installed a pair of these gaskets along with a Stage 3 Ported and Polished Professional Products Typoon intake and the fit perfectly. Absolutely no leaks. I highly recommend these gaskets.


            Year: 2003 Submodel: GT

            Helpful (10)

          • 4/5

            July 24, 2016

            It works

            At first look it looks completely fine but you look closer you'll notice that it hasn't been cleaned up after the molding so there is like little praises of plastic in the runners


            Year: 2003 Submodel: GT

            Helpful (8)

          • 5/5

            March 17, 2016

            no more leak

            Great product. Works great. no complaints shipping was fast and spot on as usual. Solved my cracked intake manifold problem. Definitely recommend spending the little extra. It is a quality piece.


            Year: 2002 Submodel: GT

            Helpful (10)

          • 5/5

            October 22, 2015

            Great item

            This item was very easy to install. Very durable item. I was swapping out my old intake manifold.


            Year: 2000 Submodel: GT Ft Lauderdale

            Helpful (9)

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