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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 $202.99 You Save 13% ($26.56)
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  • Item 100612
  • MPN# 40297

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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

    CA Residents: Warning: California's Proposition 65

    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

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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.

      Robert64

      Year: 2004 Submodel: GT

      Helpful (0)

    • 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.

      SamuelL

      Year: 2011 Submodel: GT

      Helpful (0)

    • 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!!

      MichelA

      Year: 1988 Submodel: LX

      Helpful (4)

    • 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!

      DanielZ

      Year: 1991 Submodel: LX

      Helpful (3)

    • 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.

      ChristopherC

      Year: 2011 Submodel: GT500

      Helpful (3)

    • 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.

      Rob

      Year: 2004 Submodel: Mach 1

      Helpful (3)

    • 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!

      MNTrackrat

      Year: 2012 Submodel: Boss

      Helpful (5)

    • 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.

      DrewsWorld

      Year: 2004 Submodel: GT Fort Washington, MD

      Helpful (4)

    • 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.

      TheBigA

      Year: 2011 Submodel: GT

      Helpful (4)

    • 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

      Jcal84

      Year: 2003 Submodel: Mach 1 South of Boston

      Helpful (3)

    • 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.

      echo3

      Year: 2006 Submodel: GT Sacramento, CA, USA

      Helpful (4)

    • 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..

      FloridaRob

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

      Helpful (4)

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