Ford Performance Ring And Pinion Installation Kit 8.8" IRS 2015-2021

Ford Performance:
90% of 100


  • Fits 8.8" Irs Axles
  • Not For Use On Solid Axles
  • Great For Gear Installations
  • Made In The USA
MSRP $169.00
You save 20%

Ford Performance Ring and Pinion Installation Kit for all 2015, 2016, 2017, 2018, 2019, 2020 and 2021 Mustangs with the 8.8" IRS Rear End.

When you choose to install new ring and pinion gears into your 2015-2021 Mustang, it only makes sense to replace the potentially worn out or damaged seals and bearings while your IRS housing is apart. The Ford Performance Ring and Pinion Installation Kit offers peace of mind against the need for a second costly tear down and rebuild. This Ford Performance (formerly Ford Racing) kit will arrive complete with all the necessary parts to swap out the ring and pinion gear set in your IRS equipped 2015-2021 Mustang.

Features and Benefits:
- All-In-One Kit Makes for a Worry-Free Install
- Designed for use with FRPP Ring and Pinion Gear Sets
- Includes All Necessary Components for Installation
- Specifically Engineered for 8.8-Inch 2015-2021 IRS Rear Axles
- Professional Installation is Highly Recommended

Included in Kit:
- OEM Pinion Bearings and Races
- OEM Differential Bearings and Races
- Pinion and Differential Shims
- Crush Sleeve
- Pinion Nut
- Pinion Seal
- Ring Gear Bolts
- Gear-Marking Compound

Please Note: Will NOT fit 8.8-inch straight/solid axles found in 2014 and earlier Mustangs.

*This kit is needed for the proper installation of M420988355A and M420988373A 2015-2021 Mustang Ring and Pinion Sets.

If you're looking for parts for your 2015-2021 Mustang, you should start by looking at the several Mustang parts that CJ Pony Parts offers from Ford Performance (formerly Ford Racing). By buying your Ford Performance parts from CJ Pony Parts, you know you're getting your Mustang parts from a reliable, reputable dealer, since CJ Pony Parts is a Top 10 Ford Performance Dealer and has been for the last 10 years. When you buy your Ford Performance Mustang parts from CJ Pony Parts, you know you have a winning combination.

Order the Ford Performance M-4210-B3 Ring and Pinion Installation Kit for your 2015, 2016, 2017, 2018, 2019, 2020 or 2021 Mustang equipped with the 8.8" IRS Rear End from CJ pony Parts today!

California Residents: Proposition 65 Warning

Installation Videos

Video Transcript

We’re here with Ford Racing's Ring and Pinion installation kit fitting your 2015 IRS Mustang.

If you're looking to change out the rear gears of your 8-point independent rear suspension 2015 Mustang, you're going to need Ford Racing's kit to do a proper installation. The kit includes the necessary shims, pinion and bearings, crush sleeve, pinion seal, differential bearings, a new bolt, marking compound, and a new set of ring bolts.

This kit will fit the 2015 IRS only. It will not fit previous IRS, or solid axle Mustangs

Vehicle Fitment

This product will fit the following Mustang years:

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