Fits 2015-2019 Mustang Super 8.8-inch IRS center section  

• Includes OEM crush sleeve and pinion nut  
  

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

• Compatible with Ford Performance 2015-17 Mustang Power Pack Calibrations that are 50 state legal with CARB EO Certificates 
  

·        M-9603-M8 – Mustang GT 5.0L Power Pack 1 

·        M-9603-M8A – Mustang GT 5.0L Power Pack 2

·        M-9452-M8 – Mustang GT 5.0L Power Pack 3

Made in the United States  

• OEM Quality - our superior surface finish, hardening and manufacturing consistency provide the strongest and quietest gears in the market. 
  

• Requires aftermarket calibration if vehicle is not originally equipped with this gear ratio or a Ford Performance Power Pack Calibration 
  

• 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