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Ford Performance IRS Differential Cover - 8.8 in. (99-04 Cobra)

Market Price $293.99 You Save 12% ($34.00)
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$259.99

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  • Item 50383
  • MPN# M-4033-G3

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    Features & Details

    • Superior Strength
    • Light Weight Aluminum Construction
    • Includes Fill and Drain Plugs
    • Direct Fit Replacement
    • Fits 1999 to 2004 SVT Cobras w/ IRS
    Lighter and Stronger. When upgrading the rear gears in your SVT Cobra it's a good idea to replace that wimpy stock Girdle Support System (a.k.a. differential cover) with a super strong, light weight Aluminum Differential Cover for additional safety and peace of mind.

    Ford Racing Quaility. Add performance parts to your Pony made by the people who know it best. This Ford Racing 8.8" Rear End Differential Cover is cast from lightweight aluminum for strength and features convenient fill and drain plugs. The load bolts provide additional support for the differential bearing caps to increase ring and pinion gear life.

    Recommended Upgrade. When changing your differential cover it is recommended to upgrade to fresh Royal Purple Synthetic Gear Oil. You will need 3 quarts of Gear Oil.

    Application. This Ford Racing IRS Rear End Differential Girdle Cover is designed to fit the 1999 to 2004 SVT Cobras equipped with the 8.8" Independent Rear Suspension (IRS) rear end. not for use on non-IRS Mustangs.

    Fitment: 1999 2001 2003 2004 Details

    What's in the Box
    • (1) Girdle cover
    • (10) Washers
    • (10) Bolts
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    5 Questions / 6 Answers

    Ask a Question

    Will this work with the Steeda IRS differential brace? I know that the LPW will not work with the brace.

    BuiltToughCobra

    • No, but if you use this cover you no longer need a diff brace.

      kick6

    Helpful (1)

    Tapped hole for mech temp sensor? Are one of those holes a tapped hole for a mechanical temp sender? Jim Morrissey/ aka. Jimmysidecarr

    Jimmysidecarr

    • No, the top hole is for a diff cooling system, the middle one is the fill hole and the bottom is the drain hole. On the inside of the cover they have a place marked on it where you can tap and drill your own temp sensor hole

      03SVTMarc

    Show 2 more answers Helpful (1)

    How much gear oil is meant to be used with this cover? Some people report 2.5 quarts is too much. The original cover calls for 1.5-2 quarts.

    SpencerB

    • The Ford Performance IRS Differential Cover requires 3 quarts of gear oil.

      AMJacksonH

    Helpful (0)

    Is this cover compatible with the FTBR 1401 delrin lowering mount?

    Paul101685

    What gasket was used for this cover?

    Francisco

    • The Ford Performance IRS Differential Cover will use an OEM style gasket, or RTV silicone sealant.

      AMRobD

    Helpful (0)

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    Customer Reviews (20) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$250-$500

    • Performance Gain 4.647059 4.6
    • Fit 5 5



    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      March 22, 2018

      Ford performance diff cover

      This is a very high quality cover , much thicker then stock one and much better looking. This cover should be a much stronger piece. I would recommend this product to all who are interested.

      JonF

      Year: 2003 Submodel: Cobra

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      March 13, 2018

      Just what my Cobra needed.

      Like everyone has said, this thing is heavy duty and will probably outlast my life time. when the time comes to fix that leaky rear end diff, this is a must upgrade. Too bad it's not visible because it looks nice as well.

      shottsfired

      Year: 2003 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      February 01, 2018

      Better than wimpy stock cover

      This is a well built product. Much better than the wimpy stock diff cover. I have much more confidence now with this well built replacement. Had this installed when I replaced my stock gears with new Ford Racing 4.10.

      BrianA

      Year: 1999 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      December 29, 2017

      Great Cover

      For the value you can’t go wrong, eventually your oem cover will fail this in my opinion is the best upgrade. Great fit and finish. Just recommend you get the better upgraded bolts as well.

      MarcoB

      Year: 2004 Submodel: Cobra

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      December 18, 2017

      Diff cover

      You honestly don't have to take the whole rear end put it took about 3 hours but it was on a stand worth buying for the price you pay

      RubenF

      Year: 2003 Submodel: Cobra

      Helpful (3)

    • 2/5

      Installation Time: Full Day

      June 23, 2017

      Mineral Grey 03 Cobra

      Highly recommended, fits great and looks better. It took awhile to install, I had to remove the rear diff pumpkin completely out of the car. Once on the bench it took 20 minutes to put the new cover on.

      FredK

      Year: 2003 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      May 25, 2017

      Strong cover..

      Great looking cover, fits great and not to bad to install if you're familiar with removing the IRS. Worth the money!!

      RobertH

      Year: 2003 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 16, 2017

      Beefy

      This FRPP diff cover is about twice as thick as the stock piece, with plenty of reinforcement. With the included drain plug, changing diff oil will be easy and it comes ready to hook up to a diff cooler if you need one.

      ZachS

      Year: 2004 Submodel: Cobra

      Helpful (3)

    • 5/5

      August 08, 2016

      03 Cobra IRS Differential

      I had to replace my stock Differential cover and am glad I chose the Ford Racing cover. There is a huge difference from the stock to the Ford Racing. You can tell the Ford Racing diff cover is built to withstand high horsepower while the stock is just a puny cover. Glad I upgraded. No leaks from the new.

      Jonathan

      Year: 2003 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Full Day

      May 29, 2015

      Ford Racing IRS cover

      The entire rear end has to be disassembled, and differential has to come down in order for it to fit, you will also need an extra person put it in. Ensure you put the right amount of fluid in, I made the mistake of putting in 2.5 quarts and once pressurized it throws it back out through the vent tube. Overall I love the look, fit, and the peace of mind that your cover won't crack that easily on a hard launch.

      Aldo

      Year: 2003 Submodel: Cobra Palmdale, CA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 29, 2015

      Great product a must for IRS

      Installed a billet flow IRS brace and 2 years later the thin stock cover had a leak that I noticed over the winter. Since I had to take it apart I went ahead and did the new ford racing differential cover and bushings. American muscle had the best price and offer a military discount which I very much appreciate. Free shipping just can't go wrong.

      Joe

      Year: 2004 Submodel: Cobra Franklin, OH

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      August 22, 2014

      Much stronger than stock

      This differential cover is much thicker and stronger than the weak stock cover. This product has gave me peace of mind that I won't break a cover during hard launches.

      Terminated150

      Year: 2003 Submodel: Cobra Minneapolis, MN, USA

      Helpful (4)

    • 4/5

      Installation Time: Weekend

      June 25, 2014

      Should have come from the factory like this

      IRS brace or a beefier cover (such as this one) is absolutely necessary for the IRS cobras as the weak stock unit has a tendancy to break open during the jerky motion of wheel hop. The drain plug and cooler plug is an added bonus. Be ready to spend some time with this install. At least one full day of work if you've never disassembled the IRS before. My only complaint is that the machined mating surface had suffered some damage in transit. Could have been packaged better.

      RichC1987

      Year: 2004 Submodel: Cobra Toronto,On

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      March 29, 2014

      Worth it

      Bought this cover to complete my diff rebuild. Huge upgrade over stock. I feel the cost is a little high for the part,but after installing it,I quickly forgot about that lol.

      Cobrajet78

      Year: 2001 Submodel: Cobra Nj

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      September 21, 2013

      Extremely HD diff monunt perch over stock cover

      Extremely HD over stock cover. Preload bolts for caps & provisions for external oil cooler circuit! Nive product.

      SpeedNut

      Year: 1999 Submodel: Cobra MA

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      March 22, 2013

      Ford IRS Differential Cover

      I blew the differential seal at the dragstrip last year.I noticed a little bit if oil on the floor while the car was stored over the winter.I decided to upgrade the wimpy stock diff cover with the Ford Racing one.Very nice quality and fit.I like the fact that there is a drain plug in the cover.Highly recommended!!!

      Venom03

      Year: 2003 Submodel: Cobra Winnipeg,Canada

      Helpful (4)

    • 5/5

      January 18, 2013

      Ford Racing Diff Cover

      I got my Ford Racing Cover the day after I ordered it as always from AM . It is a solid piece no doubt . Will be installing it over the winter . I have no doubt what so ever it will fit perfect . I know for fact it will look awesome .More importantly it will be very strong to handle some good RWHP. Thanks AM !

      DTC03snake

      Year: 2003 Submodel: Cobra Wilm .DE

      Helpful (3)

    • 5/5

      Installation Time: Weekend

      November 11, 2012

      Diff cover swap

      My cobra was leaking differential fluid so I put a Billetflow irs brace on it and it continued to leak so I put the ford racing cover on and it hasn't dripped since. Amazing product

      03SVTMarc

      Year: 2003 Submodel: Cobra Paoli, PA, USA

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      November 09, 2012

      Ford Racing 8.8 03 Cobra Diff Cover

      I recently purchased this newly designed diff cover for my 03 cobra to replace the stocker along with my added billet flow irs brace. This is truly a very nice piece and the fit is perfect. In fact, this is what ford should have designed and installed on the car 9 years ago! The installation took about 5-6 hours on the irs because you have to tilt the sub-frame out of the car to remove the pumpkin to put the new cover on (you can not install in place). I used a lube locker gasket and some nice RP synthetic gear oil to put it all back together. All and All I highly recommend this cover for all cobra owners even though the work required to install is high.

      fastgt110

      Year: 2003 Submodel: Cobra Matawan, NJ, USA

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      November 09, 2012

      ford racing differential cover

      You can see the quality difference from the stock cover just by looking at it, I feel great about upgrading to this cover. The cover even comes with the longer bolts you'll need since this one is so much thicker than the original. It was an easy install but we had the differential out of the car I would imagine it would be a little more difficult getting the thicker cover in and out if we tried to do it with the differential still on the car, but aside from that it's a great product and I'm extremely pleased with it.

      hannah216

      Year: 2001 Submodel: Cobra

      Helpful (3)

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