2015-18 Mustang Ford Performance 4.09 Gears by Ford Performance

Details   |  Description
  • Ford Performance Mustang 4.09 Gears (15-17) M-4209-88409A
Ford Performance Mustang 4.09 Gears (15-17) M-4209-88409A

Improve acceleration in your S550 with this Ford Performance 2015-2018 Mustang 4.09 gear kit!

Item #M420988409A
MPN# M-4209-88409A

Your Price: $295.00

Market Price:$349.00
You Save 15.47 % ($54.00)

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  • 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

Made in the USA

Product Description

Ford Performance 4.09 Gear Kit
Dramatically increase acceleration in your S550 with Ford Performance's 2015-2018 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 not compatible with 3.31, 3.55, 3.73, and 4.09 ratio gears. Use differential M-4204-MT or M-4204-M.

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

-Fits 2015-2018 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

1996-2017 Speedometer Correction - Click Here

Ford Performance Racing Parts - NO WARRANTY - Click Here

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Vehicle Applications

Ford Mustang - 2015 (15) - 2016 (16) - 2017 (17) - 2018 (18)

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 LatemodelRestoration.com. If you want the best for your Mustang or SVT Ligtning, look no further than Ford Performance Parts!

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