Ford Performance S550 Mustang IRS Super 8.8" Ring & Pinion Set - 4.09 Ratio (2015-2020)

$60.00 (17%)
Part Number: 161 M-4209-88409A
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These Ford Performance Super 8.8" 4.09 gears are a great way to make massive acceleration gains on your IRS 2015+ Mustang! Steeda equipped its world-record-breaking NA 2018 Mustang GT with this gear set for the 10.98 second run in February of 2018. Factory gears are set for a great balance between fuel efficiency and performance, leaving some performance left to be pulled out. This means a gear swap can make a major difference for getting more out of your vehicle.

The kit includes a pinion gear, a ring gear, a pinion nut, and a crush sleeve. Since it's a Ford Performance product, you'll have no issues with fitment, though the gear set is not compatible with a 3.15 differential.  If your car has a 3.15 ratio you must use either M-4204-MT or M-4204-M.


Product Benefits:

  • OEM quality & fit
  • Improved launch
  • Increased acceleration
  • Fits 2015-2020 Mustang EcoBoost/V6/GT

CA Residents: Cancer and Reproductive Harm WARNING

Fitment & Features


Manufacturer: Ford Performance

Vehicle Fitment:

Fits Model Year: 2015, 2016, 2017, 2018, 2019, 2020
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