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Ford Performance Pinion Flange (03-04 Cobra)

Item 50390
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Market Price $79.08 You Save 12% ($9.10)
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$69.98 (each)

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    Features & Details

    • Direct Fit Replacement
    • Designed for Use with 1350 U-Joint Flange
    • 4.25" Bolt Circle
    • Genuine Ford Racing Part
    • Fits 2003-2004 SVT Cobra
    Extra Insurance. When installing a new drive shaft or gears in your Cobra, a new Ford Racing Pinion Flange is extra insurance against future problems. Why use that old, unreliable flange when you can replace it with a brand new one to ensure your drive line performs flawlessly.

    Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures a perfect fit and years of hassle-free use.

    Application. This Ford Racing Pinion Flange is a direct fit replacement for the 2003-2004 SVT Cobra Mustangs with a 1350 U-joint flange.

    Technical Note. This Cobra Flange is required for the installation of an 8.8" Rear Axle Assembly when swapping out the factory rear from a 2005-2014 V6 Mustang.

    Fitment: 2003 2004 Details

    MPN# M-4851-B

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Pinion Flange
    Installation Info
    Will it fit my Mustang?

      Customer Photos (3) Submit Your Photo

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        Questions & Answers (3)

        3 Top Rated Questions

        Is this flange needed to do a t56 swap in 04 gt. Thanks

        • The Ford Performance Pinion Flange is designed to mate to the 03-04 Cobra driveshaft. Depending on what type of Driveshaft you are using, this may or may not work for the T56 swap, as there are a number of different ways to do this conversion.

        Helpful (0)

        swapping my 07v6 rear end to 8.8/3.73 rear end assembly, do i need this cobra pinion flange? Also, do I need to change stock v6 DS to a one piece GT DS? 28 or 31 spline yoke needed as well?

        • If you are swapping the rear end out of a 2007 V6, you will need the Ford Performance Pinion Flange. You will not need anything else for a proper install. You can still use the factory driveshaft if this Flange is installed.

        Helpful (0)

        Work with v6 Is this the pinion flange that is needed to take a 05-09 v6 and put a 8.8 gt rear in it and still use the factory driveshaft?

        • Yes

        Helpful (0) Show 1 more answer
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          Customer Reviews (21) Write a Review

          Overall Rating 4.8

          out of 5 stars

          • 5/5

            February 19, 2019

            Saleen 03 cobra

            Great part must have if you doing a Terminator swap


            Year: 2003 Submodel: Cobra

            Helpful (1)

          • 5/5

            June 25, 2018


            I wanted to do a 7.5 to 8.8 rear end swap and this flange made it simple


            Year: 2005 Submodel: GT

            Helpful (8)

          • 5/5

            January 01, 2018

            New and shiny!

            It just lighted up the diff. Went in with no hassle and the best price around.


            Year: 2003 Submodel: Other

            Helpful (9)

          • 4/5

            November 10, 2017

            Good Quality, Poor rust proteccion

            Its good, it holds the power very well, I used it to upgrade my 7.5 rear end to 8.5 rear end on my 2007 v6, but after a week of use i noticed a lot of rust on it so i had to take it back out sand it down and paint it (i don't like rust at all)


            Year: 2004 Submodel: V6

            Helpful (9)

          • 5/5

            March 22, 2017

            03 mustang cobra

            Great part fast shipping really recommended ford racing is the best way to go with


            Year: 2003 Submodel: Cobra

            Helpful (9)

          • 5/5

            March 16, 2017

            Good product great shipping

            Needed this to upgrade my foxbody to the heavier duty 1350 u joints. American muscle had it in stock and I had it the very next day. Amazed with the shipping times.


            Year: 1991 Submodel: LX

            Helpful (10)

          • 5/5

            November 14, 2016

            SRA swap

            Bought this to put on a solid axle when swapping into my 03 cobra in order to use the factory driveshaft. Works perfect does as it should.


            Year: 2003 Submodel: Cobra

            Helpful (10)

          • 5/5

            June 10, 2016

            Necessary part for an 8.8 conversion

            The Cobra pinion flange is a necessary part when converting an '05-10 V6 to an 8.8 axle assembly. Fits right onto the pinion and provides the correct distance for the V6 driveshaft to mate with the 8.8 rear end.


            Year: 2005 Submodel: V6

            Helpful (13)

          • 5/5

            May 29, 2015

            Fit well

            Easy installation 4 screw n 2 jaw puller did the trick..


            Year: 2003 Submodel: Cobra Bellflower, CA

            Helpful (11)

          • 4/5

            May 20, 2015

            mustang v6 flange

            the only thing I didn't like it didn't come with instructionsare more power


            Year: 2005 Submodel: V6 Iowa city, IA

            Helpful (10)

          • 5/5

            January 14, 2015

            Pinion flange

            Changing 7.5 differential on 06 Mustang to 8.8 from GT Not only was the part exactly what I needed, the AM rep knew what I needed before I asked. Great staff, reasonable price.


            Year: 2006 Submodel: V6 Houston TX

            Helpful (11)

          • 5/5

            October 17, 2014

            2005-2009 V6 Upgrade

            I put in a 8.8" rear end from a GT. This pinion flange is exactly what is needed to connect your V6 driveshaft. Installation was easy and it works perfectly.


            Year: 2009 Submodel: V6

            Helpful (12)

          • 5/5

            August 22, 2014

            Another Quality Product!

            I purchased this part due to suggestion by American Muscle...and I am glad I listened to them. I did an 8.8 swap this morning at a shop on my car...and the original pinion flange on the axle will NOT bolt up to my v6. Luckily I had listened to American Muscle and ordered this part. The shop had it installed in about 10 minutes and set to work on bolting the axle back up to the car. The part arrived quickly, and was packaged very well. AmericanMuscle has never steered me wrong. Quality Products. Amazing Customer Care/Service. All around great business! I called an spoke to someone to verify if I needed this part for sure or not, the first rep couldn't tell me for sure but found me someone who could confirm for me 100%.


            Year: 2008 Submodel: V6 SF Bay Area, CA

            Helpful (12)

          • 5/5

            July 23, 2014

            Needed it for my new ford racing rear end

            Bolted right up! Needed it so I could use my v6 driveshaft with the new rear end.


            Year: 2014 Submodel: V6 cheyenne,wy

            Helpful (10)

          • 3/5

            July 18, 2014

            Good OEM part

            Good part if replacing rear end on v6 mustang. Needed in process


            Year: 2008 Submodel: V6

            Helpful (11)

          • 5/5

            May 23, 2014

            Necessity for a 7.5" to 8.8" swap on S197 V6

            I recently swapped my 2008 V6 stock 7.5" axle with a 2014 GT 8.8" track pack axle. this product is a necessity for that. Worked perfectly.


            Year: 2008 Submodel: V6 Grantham, NH, USA

            Helpful (12)

          • 5/5

            April 22, 2014

            works great for a gt rear end swap on a v6.

            I purchased the 03/04 cobra pinion flange to put on a 06 gt rear and to install on my 2010 v6. Installation went easy as it bolts right up. You have to check to torque on the pinion nut to torque it down to the same spec. Installed the new rear end on my 2010 v6 and WOW its amazing. Great product fast shipping. I will continue to purchase my parts from American Muscle.


            Year: 2010 Submodel: V6 Moscow mills, mo

            Helpful (9)

          • 5/5

            September 22, 2013

            Awesome customer service!!!

            I recently swapped my v6 rear end for one from a roush mustang on my 06 Mustang. I was asking some question about the swap and one of your employees personally Messaged me and told me exactly what I needed. He also sent a link and picture, so buying this part from your website was a click away and couldn't have been any easier!! The part I ended up needing was a 03-04 cobra racing pinion flange. The part was very reasonably priced and was exactly what I was expecting. The flange was carefully packed and I was able to directly bolt it on right out of the box.. I have put this flange through some agressive driving and high speeds and it has not let me down!!!! I was also very pleased with how quick the part got to me in Ontario, Canada and the low costs of shiping.Thanks American Muscle!! You can look forward to doing business with this happy customer in the future!!!


            Year: 2006 Submodel: V6 Windsor, ON, Canada

            Helpful (11)

          • 5/5

            May 25, 2013

            A must do.

            Simply put, this is a must have for modified Cobras. I can tell the car is doing much better after putting this in.


            Year: 2003 Submodel: Cobra McLean, VA, USA

            Helpful (10)

          • 5/5

            May 21, 2013

            Just What I Needed!

            Needed a pinion flange for my cobra swap and it worked great. No wine or odd noises and really easy to install. You also cant beat how fast American muscle gets it to you!


            Year: 2001 Submodel: GT

            Helpful (10)

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