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Richmond Super 8.8 Ring and Pinion Gear Kit; 4.09 Gear Ratio (15-21 All)

Item 406944
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Market Price $383.38 You Save 13% ($50.01)
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$333.37 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Ring Gear and Pinion Kit
      • 4.09 Gear Ratio
      • Compatible with 3.31 Ratio Carrier and Higher
      • Ford Super 8.8 Differential Case Design Type
      • 12 Cover Bolts
      • 8620 Steel Ring Gear Material
      • Made in the U.S.A.
      • 2-year, 100,000 “No-Nonsense” Warranty
      • Difficult Installation
      • Compatible with All 2015-2021 Ford Mustangs


      By Richmond. The Richmond Super 8.8 Ring Gear and Pinion Kit - 4.09 Gears helps improve the rotation of your axles with its grooved ring and groove-pinion-to-drive shaft set up, where improved ratios help deliver even better performance. This American-made kit by Richmond adheres to the highest quality manufacturing standards with precision computer controlled heat treatment and a heavy duty construction.

      4.09 Ratio. This unit provides a 3.91 ring and pinion gear ratio with 12 cover bolts, fitting a Ford Super 8.8 differential case design type. Specifications include a pinion shaft diameter of 2.01 inches, a pinion spline count of 30, and an 8620 ring gear steel construction.

      Warranty. Richmond guarantees your product is free from defects in materials and workmanship with a 2-year, 100,000 “no-nonsense” warranty.

      Installation. Handy people can install this product with a hard level of complexity, taking roughly 3 hours to complete.

      Application. The Richmond Super 8.8 Ring Gear and Pinion Kit - 4.09 Gears is compatible with all 2015-2021 Ford Mustangs.

      Fitment: 2015 2016 2017 2018 2019 2020 2021

      Richmond 49-0213-1

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring Gear and Pinion Kit

      Customer Reviews (3)

        Reviews of Richmond Drivetrain products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions