2015-23 Mustang Ford Performance 8.8 IRS Differential by Ford Performance

2015-23 Mustang Ford Performance 8.8 IRS Differential

Beef up your 2015-2023 Mustang IRS differential with Ford Performance's traction-lok 8.8" rear differential!

Item #M4204M
MPN# M-4204-M

Everyday Low Price: $179.95

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  • Factory Replacement
  • Ford Performance Quality


  • Fits 34 Spline Axles
  • Use w/ FRPP 3.55/3.73 Gears

 What's in the Box

  • (1) IRS Differential

2015-2023 Mustang Ford Performance 8.8 IRS Differential

Looking to add rear end gears to your 2015-2023 Mustang? Ford Performance made it easy to do a complete, factory style installation with this OE replacement IRS differential! This 2015-2023 Mustang differential is intended for use with Ford Performance's 3.55 or 3.73 Super 8.8" rear gear kits for your S550 Mustang. This is the factory Traction-Lok 8.8" differential that came standard on 2015-23 Mustangs and will fit 34 spline axles.


  • Fits 2015-2023 Mustang

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  • Ford Mustang - 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023
  • Use differential install kit M4210B3.
  • Requires 4oz of friction modifier with initial fill.
  • Designed to work with 3.31, 3.55, 3.73, and 4.09 ratio gears only.
  • For use with M420988355A & M420988373A Super 8.8" gear sets.

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About This Brand

Ford Performance
Ford Performance - Mustang Ford Racing Parts
Ford Performance Parts is the leader in performance parts and accessories for Mustang and Ford Lightning. is proud to offer Ford Racing Performance Parts for your project. Ford Racing is dedicated to manufacturing the highest quality products offered in the industry. Choose from suspension, exhaust, wheels, and other performance parts at Late Model Restoration. If you want the best for your Mustang or SVT Lightning, look no further than Ford Performance Parts!
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