Talk to a Mustang Sales Tech
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$12k Summer Sweepstakes! Enter Daily>

Nitro Gear & Axle Ring and Pinion Gear Kit; 3.73 Gear Ratio (99-04 Mustang GT)

Item 404773
Nitro Gear & Axle Ring and Pinion Gear Kit; 3.73 Gear Ratio (99-04 Mustang GT)
Verify parts fit and get product recommendations.
Mustang Sales Techs: Connect Now M-F 8:30A-11P, Sat-Sun 8:30A-9P
Our Price

$264.00 (kit)

FREE Shipping Market Price $303.99 You Save 13% ($39.99) Up to 10% off for Military & First Responders! See Details

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
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

      Features & Specs

      • Performance Ring and Pinion Kit
      • Improve Performance and Power
      • 3.73 Gear Ratio
      • 8.80-Inch Ring Gear Diameter
      • Strong 8620 Steel Construction
      • Professional Installation Recommended
      • 2-Year Warranty
      • Fits 1999-2004 Ford Mustang GT Models


      Geared Up. When you’re looking for a superior ring gear and pinion for your 1999-2004 Ford Mustang GT, then get your hands on this Nitro Gear & Axle Ring Gear and Pinion Kit – 3.73 Gear Ratio. Your Mustang will immediately feel the improvements in fuel efficiency without any loss of power or torque thanks to this 8.80-inch ring gear.

      3.73 Gears. This ring gear’s 3.73 gear ratio is going to provide you with superior fuel efficiency for a Mustang you rely on every day. You’re going to love the changes this gear can bring for you and your ‘Stang.

      Heavy-Duty Construction. This ring gear and pinion are forged from heavy-duty 8620 steel to provide superior, consistent performance for years to come. You’re not going to find a better kit available.

      Recommended Upgrade. This ring and pinion can throw off your speedometer if you’re changing to a new ratio. If having it installed professionally, the mechanics should automatically tune it for you. However, a handheld custom tuner should do it for you.

      Installation. This gear and pinion kit needs a very practiced hand to install correctly. You will need about 4 hours to install, with advanced hand tools and extensive automotive mechanical expertise. Professional installation is highly recommended.

      2-Year Warranty. This ring and pinion kit is protected by Nitro’s 2-year warranty, defending against manufacturer defects from the date of purchase. See Nitro Gear’s full warranty for complete details.

      Application. This Nitro Gear & Axle Ring Gear and Pinon Kit – 3.73 Gears is designed to fit 1999-2004 Ford Mustang GT models. Please ensure correct model and trim before purchase.



      Nitro Gear & Axle F8.8-373-NG

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Ring Gear
      • (1) Pinion

      Customer Reviews (5)

        Brand Image

        Reviews of Nitro Gear & Axle Drivetrain products have an average rating of 4.6 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Bullitt - 01
          • GT - 99, 00, 01, 02, 03, 04

              Related Mustang Categories