Steeda Mustang Finned 8.8" Differential Cover w/ Fill/Drain Plugs (1986-2014)

6 Review(s)
Steedas great looking Ford OE design finned aluminum Mustang 8.8" differential cover includes both drain and fill plugs making gear oil changes easy. The fins reduce fluid temperature, increasing performance & rear end rigidity. Bolts & cover vent plug a

Part Number: 555 8142
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Suggested Mods


This functional differential cover was engineered by Ford as original equipment on the 2011-13 GT500 and 2012/13 Boss 302. This cover can be directly installed on any 1986-2014 8.8 live axle Mustang.

This innovative piece was designed with cooling fins to reduce overall gear oil temperatures and to increase rear end housing rigidity for improved gear set and bearing life. We've taken this cover a step further by installing magnetic fill and drain plugs for ease of maintenance and to trap suspended steel particles in your gear oil.

Includes bolts for installation, magnetic fill and drain plugs, and cover vent plug.

Note: The O.E. application of this cover has the axle vent on the axle cover. All other 8.8 rear ends have the axle vent already installed on one of the axle tubes. Use the included vent plug to plug the vent hole on the cover and continue to use the existing vent on the axle tube. This cover does not fit IRS-equipped Cobra models.

Product Benefits
  • Increases rear end rigidity
  • Reduces gear oil temperatures
  • Original equipment design
  • Fits all live axle 8.8 Mustangs
  • Magnetic drain/fill plugs 

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Easy
Install Time: About 1 Hour
Tools Required: Basic Shop Tools

Vehicle Fitment:

Fits Model Year: 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

Customer Reviews

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Average Customer Ratings


Boss Mustang cover.
This cover works great in my 8.8 axle swapped Datsun. No more fluid leakage, even at 140 mph. I did run the factory dingle valve at the top of the cover. (Purchased separately)
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Fast & Easy Gear oil changes
I needed a diff cover for fast oil changes and for cooling hose hook ups. This was the perfect solution. Virtually identical to the Ford diff cover, but cheaper.
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Very Cool cover
Perfect fit - Fast fluid changes
Did you find this helpful?  2 of 2 Found Helpful
Steeda FTW
Awesome differential cover, and it looks great when you rack the car!
Did you find this helpful?  7 of 7 Found Helpful
Cool cover
This should keep my rear gears cooler. Thanks
Did you find this helpful?  4 of 4 Found Helpful
Nice Rear End
Perfect fit, I change fluids often so this makes me happy :)
Did you find this helpful?  4 of 4 Found Helpful
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