Steeda Differential Bushing Insert System Solid Aluminum Mustang GT/ EcoBoost 2015-2021



  • Eliminates Wheel Hop
  • Increases Traction
  • Billet 6061 Aluminum
  • Made in the USA

Steeda Solid Aluminum Differential Bushing Insert System for 2015, 2016, 2017, 2018, 2019, 2020 and 2021 GT and EcoBoost Mustangs.

Improve your performance on the strip with the help of this Solid Aluminum Differential Bushing Insert System 555-4440 from Steeda! Designed and engineered for hardcore racers, this kit will eliminate pinion angle changes, wheel hop and differential deflection. At the same time, it increases traction in your 2015-2021 GT or EcoBoost Mustang.

Features and Benefits:
- Limits IRS Differential Movement 
- Increases Traction
- Eliminates Wheel Hop
- Designed to Meet Racing Needs
- Adjustable and Easy to Remove
- Completely Designed and Made in the USA
- Quick and Easy Installation

Steeda's race kit is made in-house of billet 6061 aluminum. It provides the strength and support that the OEM bushings need to meet race and performance needs, and it's designed to withstand the abuse seen racing down the 1/4 mile.

The kit is not a permanent modification, meaning it's easy to install and easy to remove. When you purchase this race kit, you'll receive aluminum bushings for the front and rear differential mounting locations. Grade 10.9 hardware is also included with zinc-plated washers.

Please Note: This is a race-only part. It will increase NVH and gear noise. For street and competition use try 5554439 with urethane bushings.

Vehicle Fitment:
- 2015-2021 GT Mustang
- 2015-2021 EcoBoost Mustang

California Residents: Proposition 65 Warning

Installation Difficulty


Novice skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

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