2015-2019 Mustang IRS Super 8.8-Inch Ring And Pinion Set - 4.09 Ratio


SKU: M-4209-88409A Ford Performance

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  • 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 ‚Äď Mustang GT 5.0L Power Pack 1¬†

¬∑¬†¬†¬†¬†¬†¬†¬† M-9603-M8A¬†‚Äď Mustang GT 5.0L Power Pack 2

¬∑¬†¬†¬†¬†¬†¬†¬† M-9452-M8 ‚Äď 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