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EXCEL from Richmond Ring Gear and Pinion Kit - 3.55 Gears (11-14 V6)

Market Price $186.99 You Save 12% ($22.04)
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  • Item 21525G116

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    Features & Details

    • Superior Quality
    • 3.55:1 Gear Ratio
    • 8.8" Ring Gear Diameter
    • For Street or Track Use
    • Made in the USA
    • Fits 2011-2014 V6 Mustangs
    Improve Off The Line Acceleration. A set of Richmond Excel 3.55 Ring and Pinion Gears are a great way to get your V6 powered S197 Mustang up off the starting line faster. Most 2011-2014 3.7L V6's came factory equipped with 2.73 or 3.31 gears, which are fine for the daily commuter who is concerned about gas mileage, but not for you the spirited driver. By upgrading to a steeper set of rear gears your Mustang will enter into the power band much sooner for increased low end torque and quicker acceleration. Richmond's Excel 3.55 Gears are ideal for drivers who are looking to improve the driving performance of their V6 Pony.

    Superior Quality. Richmond proudly manufactures their Ring and Pinion Gear Sets right here in the USA. Using state-of-the-art manufacturing processes and extensive quality control testing, Richmond produces a superior quality Ring and Pinion Gear Set at an excellent price. Richmond is so confident in the quality of their products that they back them with a 6 month, 50,000 mile no-nonsense warranty.

    Required Upgrade. Starting in 2010 Ford changed the inner rear gear pinion bearing in all 8.8" equipped Mustangs. Because of this you will require a new 8.8" rear gear pinion bearing (Ford part# 9L3Z-4630-A) for proper installation, please see drop down option above.

    Recommended Upgrade. Please note that when changing the gear ratio of your Mustangs rear differential that the calibration of your speedometer will no longer be correct and will display the wrong speed. However, you can easily fix this annoying issue with a Handheld Tuner (sold separately).

    Application. This 3.55 ratio Richmond Excel Ring and Pinion Gear set will fit all 2011 to 2014 3.7L V6 Mustang models equipped with an 8.8" solid axle rear end. 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: 2011 2012 2013 2014 Details

    MPN# F88355

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Ring gear
    • (1) Pinion gear
    Installation Info
    Tech Specs

    Approximate RPM for 2011-2014 V6

    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4007 5610        
    2 2660 3724 4788 5838 6917  
    3 1850 2590 3330 4070 4810 5550
    4 1445 2023 2601 3179 3757 4335
    5 1095 1533 1971 2408 2846 3284
    6 712 996 1281 1565 1850 2135

    Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
    1 4566 6393        
    2 2562 3586 4611 5636 6660  
    3 1665 2331 2997 3663 4329 4995
    4 1251 1752 2252 2753 3253 3754
    5 949 1329 1708 2088 2468 2847
    6 756 1059 1362 1664 1967 2269
    Will it fit my Mustang?

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    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    • 5/5

      September 16, 2016

      Great sound for roush exhaust

      I had a magnaflow exhaust and it sounded nice on my Mustang 2013 v6 but I wanted something more aggressive and louder. So I purchased an roush exhaust and it's just the perfect sound, fit and look for my car.


      Year: 2013 Submodel: V6

      Helpful (3)

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