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Richmond Super 8.8 Ring and Pinion Gear Kit; 3.91 Gear Ratio (15-21 All)

Item 406943
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Market Price $302.20 You Save 13% ($39.42)
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$262.78 (kit)

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      Product Information

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


      • Ring Gear and Pinion Kit
      • 3.91 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


      High-Performance Drivetrain Product by Richmond. Improve your axle rotation with the high-performance Richmond Super 8.8 Ring Gear and Pinion Kit - 3.91 Gears. This American-made ring gear and pinion kit delivers the goods with precision engineered, computer heat treated parts to withstand the rigors of the trails.

      3.91 Ratio. This unit provides a 3.91 ring and pinion gear ratio with a 3.31 or higher carrier break, Ford Super 8.8 differential case design type, and an 8.8-inch ring gear diameter, along with a 43 ring gear tooth count.

      Warranty. Richmond guarantees your product is free from defects in materials and workmanship with a 2-year, 100,000 “no-nonsense” warranty. Damage as a result of abuse, neglect or poor quality maintenance will not be covered.

      Installation. You should expect to take no more than 3 hours installing this product, with a hard level of difficulty if you have light to moderate mechanical skills.

      Application. The Richmond Super 8.8 Ring Gear and Pinion Kit - 3.91 Gears is compatible with all 2015-2021 Ford Mustangs.

      Fitment: 2015 2016 2017 2018 2019 2020 2021

      Richmond 49-0212-1

      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