• • Fits 2015-2019 Mustang  Super 8.8-inch IRS center section 
  • Requires M-4210-B3 Mustang 8.8-inch ring gear and pinion install kit 
  • Made in the United States at Ford's Sterling Axle Plant 
  • OEM Quality - our superior surface finish, hardening, and manufacturing consistency provide the strongest and quietest gears in the market.   
  • Requires aftermarket calibration if the vehicle is not originally equipped with this gear ratio

  Note: 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                                                              

                                                      WARNING:
•  
  This part has been designed and is intended for off-highway application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations relating to emission requirements and motor vehicle safety standards.

Fitment: 2015, 2016, 2017, 2018, 2019 Ford Mustang S550