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Maximum Motorsports Modified Ford Performance IRS Differential Cover (99-04 Cobra)

AmericanMuscle no longer carries the Maximum Motorsports Modified Ford Performance IRS Differential Cover (99-04 Cobra). Please check out 1999-2004 Mustang Gears for an updated selection.
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Features & Details

  • Modified for Compatibility with MM Aluminum Differential Mounts
  • Ford Racing Performance Products have OEM Fit
  • Reinforced IRS Differential Cover
  • Easier Servicing with Separate Ports for Draining, Filling, and Checking
  • Includes Provision for Oil Cooler Inlet and Outlet
  • Can be Modified to Accommodate a Temperature Sensor
  • Precision-Machined Aluminum
  • Direct Fit Replacement Upgrade
  • Fits 1999 to 2004 Ford Mustang Cobra Models
Reinforced Differential Cover. The stock IRS differential cover can break and leak due to impacts during a wheel hop because of the thin material and freely moving center section. The Maximum Motorsports Modified Ford Performance IRS Differential Cover features a thick, aluminum cover that is reinforced and designed to prevent movement of the center section. This results in a dramatic decrease in the possibility of breakage. Additionally, the cover is precisely machined to accommodate the outstanding MM Aluminum Differential Mounts used in drag racing.

CNC-Machined Aluminum Construction. The Modified IRS Differential Cover is made from thick and durable aluminum alloy to provide the toughness and durability that is well above that of the stock cover. Additionally, the precision-machining gives the cover the necessary clearance to be used with the MM Aluminum Differential Mounts without weakening its structure.

Direct Fit Replacement Upgrade. The Modifed IRS Differential Cover is designed for an OE fit and doesn’t require any additional fabrication. A step-by-step installation instruction sheet is included.

Application. The Maximum Motorsports Modified Ford Performance IRS Differential Cover is designed for use with 1999 to 2004 Ford Mustang Cobra models. The MM Aluminum Differential Mounts is sold separately.

Fitment: 1999 2001 2003 2004 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Axle Girdle Assembly
  • (10) Washers
  • (10) Bolts
Installation Info
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Questions & Answers (1)

1 Top Rated Question

How much gear oil should be used with this cover? I have found a lot of conflicting information about this. Ford's instructions are fill it till it leaks out which would be more then 3 quarts. Some people are saying 2.5 quarts is too much. The original stock cover calls for 1.5-2 quarts.

  • The Maximum Motorsports Modified Ford Performance IRS Differential Cover should be filled to just below the fill port. Typically this will take 2-2.5 quarts.

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Customer Reviews (1) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 5 5
  • Fit 5 5

  • 5/5

    Installation Time: Less than 1 Hour

    March 05, 2018

    Cobra diff cover.

    It’s what you would want if you wanted the best diff cover for any of the irs cobras. It comes with caps to support the carrier caps which is what failed on the old setup costing me 1,000 dollars to fix myself. This is not just an upgrade but perventive Maintenance


    Year: 1999 Submodel: Cobra

    Helpful (1)

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