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2015-2022 Mustang Ford Performance 4.09 Gears by Ford Performance

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Details   |   Reviews
2015-2022 Mustang Ford Performance 4.09 Gears

Improve acceleration in your S550 with this Ford Performance 2015-2022 Mustang 4.09 gear kit!

Item #M420988409A
MPN# M-4209-88409A

Everyday Low Price: $279.99

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Made in the USA


  • Increased Acceleration
  • Improved Launch
  • OEM Quality Gears


  • 4.09 Gear Ratio
  • Heavy Duty Construction
  • Made in USA

 What's in the Box

  • (1) 4.09 Pinion Gear
  • (1) 4.09 Ring Gear
  • (1) Crush Sleeve
  • (1) Pinion Nut

Ford Performance 4.09 Gear Kit
Dramatically increase acceleration in your S550 with Ford Performance's 2015-2020 Mustang 4.09 gear kit! Your factory gears are built to maximize fuel mileage, which leaves much to be desired in the performance department. A gear change can provide a night and day difference when it comes to launching your S550 at the track. This 4.09 rear end gear kit includes a new pinion gear, a ring gear, a crush sleeve, and a pinion nut to get your S550 accelerating quicker than ever!

OEM Quality
Ford Performance 8.8" Mustang gears are the choice of championship road racing and drag racing teams. Their superior surface finish, hardening and manufacturing consistency, will provide the strongest and quietest gears on the market! When your plans call for an 8.8" Mustang Rear Gear look for the only brand good enough to wear the Ford oval, Ford Performance Parts!

Fitment Note
  • 3.15 ratio differential is not compatible with 3.31, 3.55, 3.73, and 4.09 ratio gears. Use differential M-4204-M.

    Installation Note
  • Requires M-4210-B3 Mustang 8.8-inch ring-gear and pinion install kit.

  • Fits 2015-2022 Mustang Ecoboost, V6, and GT

    Speedometer Correction
    After installation of rear gears, you will need to correct the speedometer. There are different methods to do this depending on year model.

    1979-1995 Speedometer Correction - Click Here
    1996-Present Speedometer Correction - Click Here

    Ford Performance Racing Parts "Packs" and Component Parts Limited Warranty - Click Here
    Ford Performance Racing Parts - NO WARRANTY - Click Here
    Ford Performance Racing Parts Crate Engine Limited Warranty - Click Here

    • Ford Mustang - 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022

    California Residents:
    Prop 65 Warning SignWARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

    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.

    LMR.com 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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