2015-2021 Mustang Ford Performance 3.55 Gears
Upgrade the rear gears in your S550 with a set of Ford Performance 3.55 gears for your 2015-2021 Mustang. 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. While these Ford gears do not increase horsepower, they will definitely allow your Mustang to launch harder and quicker! Ford Performance 8.8" Mustang gears are the choice of championship road racing and drag racing teams around the globe. These IRS rear end gears fit the Ecoboost, V6, and GT models with 8.8" rear ends. Perfect for high horsepower applications and includes a new pinion gear, a ring gear, a crush sleeve, and a pinion nut. Allow your S550 Mustang to accelerate quicker than ever with this 3.55 rear-end gear kit is an excellent choice to get!
- 3.15 ratio differential not compatible with 3.31, 3.55, and 3.73 ratio gears. Use differential M-4204-MT or M-4204-M
- Fits 2015-2021 Mustang Ecoboost, V6, & GT
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