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B&M Finned Differential Cover - 8.8 in. (11-14 V6; 86-14 V8, Excluding 03-04 Cobra & 13-14 GT500)

Market Price $207.99 You Save 9% ($18.04)
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  • Item 100612

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    Features & Details

    • Finned Design Dissipates Heat - Increases Gear Life
    • Light-Weight Cast Aluminum Construction
    • Magnetic Drain Plug Included
    • Features "B&M" Logo
    • Fits 1986-2014 8.8" Solid Axle Equipped Mustangs
    Stronger Than Stock. When upgrading the rear gears in your Mustang it's always a good idea to replace the wimpy stock differential cover with a super strong, light weight Aluminum Differential Cover for additional safety and peace of mind.

    Finned Aluminum Reduces Heat. Constructed from light-weight cast aluminum the B&M Mustang 8.8" Differential Cover features a finned design that dissipates heat much faster than the factory unit to prolong the life of your ring and pinion gears.

    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 Finned B&M Differential Cover is designed to fit the 1986-2014 Mustangs equipped with the 8.8" solid axle rear end, including the 2011-2014 V6, 1986-2014 GT, Bullitt, Mach 1, BOSS, Shelby GT500 and 1993-1998 SVT Cobra. It will

    not fit 1999-2004 Independent Rear Suspension (IRS) equipped SVT Cobras.

    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 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Details

    MPN# 40297

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Axle Differential Cover
    • (1) Magnetic Drain Plug
    • (12) Bolts
    • (10) Washers
    • (2) Nuts
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • Bullitt - 01, 08, 09
    • Cobra - 93, 94, 95, 96, 97, 98
    • Cobra R - 93, 95, 00
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14
    • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 11, 12, 13, 14

    Fits Mustangs equipped with a 8.8" rear end only. Does not fit 1999-2004 IRS equipped Cobras

      Customer Photos (3) Submit Your Photo

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        Questions & Answers (3)

        3 Top Rated Questions

        Will this Diff cover fit an 97 cobra with an 8.8 running a 4.30 Ring and Pinion? Thanks

        • Hello, The B&M Finned Differential Cover Is designed to fit 1986-2014 Mustangs equipped with the 8.8" solid axle rear end, including the 2011-2014 V6, 1986-2014 GT, Bullitt, Mach 1, BOSS, Shelby GT500 and 1993-1998 SVT Cobra.

        Helpful (0)

        Would this cover fit while using a Fays2 style Watts-link? Specifically on a 2011 GT. Thanks.

        • Unfortunately we cannot guarantee fitment for this application. I would recommend contacting both manufacturers for measurements on these items to check fitment and compatibility.

        Helpful (0)

        How is clearance with the panhard bar on this? Specifically a 2008 GT with the Steeda adjustable bar.

        • See the clearance in my photo. I have a 2012 GT with LCA relo brackets and billet aluminum LCA from Steeda. I have barely any clearance but it works.

        Helpful (0) Show 1 more answer
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          Customer Reviews (12) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:0-$100

          • Performance Gain 4.083333 4.1
          • Fit 4.666667 4.7

          • 2/5

            Installation Time: Afternoon

            September 12, 2018

            B M Differential cover

            Looks like a quality product, but wouldn't fit my 2004 Saleen because it has a rear sway bar, and it hit the fins on the cover as soon as you lower the jacks and the sway bar tilts up. Went with Ford Racing diff. cover from American Muscle instead, and it works fine.


            Year: 2004 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Less than 1 Hour

            August 11, 2018

            Very Nice

            I'm laughing so hard at the guy that left the review saying that he needed "8 quarts to fill this beast" LOL. And he is using Amsoil so that is an expensive lesson, and I'm sure the excess blew out of the axle-vent after driving and made a horrible mess. This BandM cover has a Drain hole and a Fill-Hole but the OEM Plug on the front of the axle housing has to be removed so that when fluid starts to run out of it then you know the differential is full. That is how you check the fluid level, you don't fill the axle all the way to the fill hole on the new BandM cover LOL. You'll need approx 1.2 more quarts w/BandM cover than with OEM cover.


            Year: 2011 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            February 11, 2018

            Great product!!

            This is a good looking and well made cover. I like the extra oil capacity for a cool running rear end. But most of all,the support to the main caps and quick to change rear end fluid without removing the cover! As always great service from American Muscle! Thank you!!


            Year: 1988 Submodel: LX

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            October 10, 2017

            Quality product

            I knew as soon as I opened the package that this was a high quality piece. The carrier support bolts are a nice upgrade. Also nice to have the 1 quart increase in fluid capacity over the stock cover. Looks great as well. Installed this with a Swarr Bar on a Saturday morning and couldn't be happier!


            Year: 1991 Submodel: LX

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            September 10, 2017

            Works perfectly.

            Used this with a Lube Locker gasket and Amsoil gear oil with a friction modifier. Worked perfect. After a month, no leaks or noise. Diff cover looks great under the rear and supports offer a small piece of mind.


            Year: 2011 Submodel: GT500

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            March 13, 2017

            Great product!

            Looks amazing, fit perfectly, easy install, couldn't bee happier with this product.


            Year: 2004 Submodel: Mach 1

            Helpful (5)

          • 5/5

            Installation Time: Afternoon

            January 20, 2017

            Hi Quality Part

            Looks great and fits great. I like the bearing supports, deep cooling fins, and fill and drain plugs. The only surprise is the added fluid capacity - a LOT more fluid than stock to help cooling. Plan on 8 quarts to fill this beast. At $20/qt, that's $160 of 75W 140 synthetic gear oil to finish the job!


            Year: 2012 Submodel: Boss

            Helpful (7)

          • 5/5

            Installation Time: Less than 1 Hour

            May 29, 2015

            04 Supercharged GT

            I purchased the cover as part of my gear upgrade to 3:73's. The cover was a perfect fit. The only thing I regret is not taking pictures of the finished product. My car is lowered so you can't see the cover.


            Year: 2004 Submodel: GT Fort Washington, MD

            Helpful (6)

          • 5/5

            Installation Time: Afternoon

            April 24, 2014

            Nice solid piece

            American muscle was great to deal with as always. Do a parts inventory before removing your stock cover! In my excitement to do the install I took off the stock pieces and prepped everything to go on, only to discover that B&M did not include the magnetic drain plug and the supplied washers were too big to fit into the machined holes in the cover. After I supplied my own hardware I will say its a beautiful piece and the bearing cap support bolts give me a little more piece of mind when hammering the throttle.


            Year: 2011 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            March 28, 2014

            As described and shipped immediately

            Once again I order on Wed and have my parts by Fri! AM ships their stuff right away so it takes only two days to have my parts with free standard shipping and I'm in Boston! Cover is a nice quality piece and was described well Appreciate the Mach 1Reg discount too! Both my son and myself have used AM many times and will continue to do so in the future. - Jim C


            Year: 2003 Submodel: Mach 1 South of Boston

            Helpful (5)

          • 5/5

            Installation Time: Less than 1 Hour

            March 16, 2014

            Best Diff Cover Available

            I chose this cover for its features and great looks. It seemed to have the best combination of all the features of all the covers and this part did not disappoint. This cover was an exact fit and did not require any relocation of the panhard bar. The installation instructions were easy to follow and I was able to install the cover in about an hour in my driveway. The hardware in the kit is all stainless steel and high quality (it even has a magnetic drain plug). The only complaint that I have is that this beautiful part isn't as visible to the vehicles behind me like it would be on a lifted truck.


            Year: 2006 Submodel: GT Sacramento, CA, USA

            Helpful (6)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            January 24, 2014

            Hurst B&M Finned Differential Cover

            Sweet part!!! Had installed with 3.55 gears to replace the stock 3.31's. Helping to keep temperature down for sure. Mustang with the other mods now fly's down the road..


            Year: 2013 Submodel: GT West Palm Beach, FL, USA

            Helpful (6)

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