Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$5,000 Giveaway. 5 Chances to Win! Enter Daily >

USA Standard Ring and Pinion Gear Kit; 5.13 Gear Ratio (05-09 GT)

Item 403002
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $257.99 You Save 12% ($29.76)
Our Price

$228.23 (kit)

FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    or use

      Product Information

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


      • Racing Style Ring & Pinion Gear Set
      • Suitable for Street Use
      • Gear Ratio: 5.13:1
      • Ring Gear Diameter: 8.8 in.
      • 41 Gear Teeth
      • 30 Pinion Spline Count
      • 10 Cover Bolts
      • 10 Ring Gear Bolts
      • Durable AISI 8620 Steel Alloy
      • Professional Install Recommended
      • 1-Year Warranty
      • Fits 2005-2009 Mustang GT


      Designed for Street & Track. One of the most obvious ways to boost the performance of your 2005-2009 Mustang GT is by upgrading the gear ratio to improve low end torque and increase acceleration rate. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears achieves both objectives while still leaving you money in the kitty to buy a celebratory pizza.

      5.13 Gear Ratio. The highest factory gear ratio available for the 2005-2009 Mustang GT is 3.55:1. The USA Standard Ring Gear and Pinion Kit comes in a 5.13 ratio, delivering faster times off the mark. True, you won't get any happy endings at the fuel pump but, when you're racing, you don't expect savings here, do you?

      Long-lasting Construction. The USA Standard Ring and Pinion Kit is manufactured from AISI 8620 carburizing alloy steel. You benefit from an automotive part with improved case/core properties. Precision machined to accommodate anything from the most common to the rarest differential applications.

      Installation. Full instructions are provided for those who have a high level of mechanical expertise and want to perform the installation themselves. Otherwise, experts recommend having the ring gear and pinion kit installed by a professional.

      Warranty. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears is covered by a one-year warranty against defects in materials and workmanship. Regular exclusions apply.

      Application. The USA Standard Ring Gear and Pinion Kit - 5.13 Gears fits all models of 2005-2009 Mustang GT.

      Fitment: 2005 2006 2007 2008 2009 Details

      USA Standard ZG F8.8-513

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Pinion Gear
      • (1) Ring Gear
      • Instructions

      Customer Reviews (1)

        Reviews of USA Standard Drivetrain products have an average rating of 4.5 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 08, 09
          • GT - 05, 06, 07, 08, 09

              Related Mustang Categories