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Ford Performance Ring and Pinion Gear Kit; 3.55 Gear Ratio (94-04 Cobra)

Item 50166G94SE
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Specs & Installation


      • Ford Racing Quality
      • Strong Forged Construction
      • 3.55 Gear Ratio
      • 8.8" Ring Gear Diameter
      • For Street or Track Use
      • Fits 1994-2004 SVT Cobra Mustangs


      Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Cobra. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

      Superior Quality. Manufactured in the USA, these Ford Racing Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and are completed in a black oxide finish to resist corrosion.

      Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

      Application. This Ford Racing Ring and Pinion Gear set will fit all 1994-2004 SVT Cobra Mustangs. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

      Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

      Fitment: 1994 1995 1996 1997 1998 1999 2000 2001 2003 2004 Details

      MPN# M-4209-G355A

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (6)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 6 customers

      Installation Time: Full Day

      Installation Cost: $250-$500

      • March 06, 2019

        5 1999 Cobra - Ben Installation Time: Full Day

        Great quality

        Awesome product. Really smooth gears. And now the stang has MUCH better fuel mileage

        Helpful (0)
      • November 20, 2017

        5 1999 Cobra - ChrisB Installation Time: Afternoon

        1999 cobra gears

        Had a shop install for $400. great gears, highway driving still good. pulls harder too. great for a daily driver

        Helpful (9)
      • November 06, 2017

        5 2001 Cobra - JeffreyA Installation Time: Shop Install

        3.55 cobra gear

        Very happy to have taken the 4.10 out and replaced it with this 3.55. Happy to get my rpms down and stop wearing out my motor.

        Helpful (10)
      • August 18, 2017

        5 1994 Cobra - Howard Installation Time: Full Day


        I was worried about the gears being made by a different manufacturer, but I worried for nothing. The gear teeth are cut a little different than the previous Ford Racing gears; nevertheless, they performed flawlessly and without noise. I also want to let anyone reading this know that my original gear set up was a 3.08 with a .030 pinion shim and .007 backlash. Contrary to what the Ford Racing instructions said, my 3.55 gears had the correct pattern with a .045 pinion shim and the backlash set at .010. Lastly always get new bearings!

        Helpful (9)
      • May 03, 2016

        5 2003 Cobra - FordCobra Installation Time: Afternoon

        better pull

        Rpms better on high way and street. Feels better driving and pulls better in racing. Great part and highly recommend

        Helpful (10)
      • May 02, 2016

        4 2003 Cobra - NitrousT Installation Time: Shop Install Installation Cost: $250-$500

        Good Price

        These gears are a great improvement for a Bolt On Mustang!

        Helpful (10)

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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring gear
      • (1) Pinion gear

      Tech Specs

      Will It Fit My Mustang

      • Cobra - 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
      • Cobra R - 95, 00

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