Steeda Rear Differential Adjustable Bushing Insert System Urethane Mustang EcoBoost/ GT 2015-2023

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  • Increases Traction
  • Limits IRS Movement
  • 80 & 90 Durometer Bushings
  • No Increase In NVH

Steeda Urethane Adjustable Bushing Insert System for the Rear Differential of 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, and 2023 EcoBoost and GT Mustangs.

Steeda has once again taken the S550 Mustang to the next level of performance and comfort with their Adjustable Urethane Differential Mount Bushing Insert System. When Steeda’s engineers sat down to design this kit, their goal was to come up with a way to increase performance without sacrificing an ounce of drivability all while keeping the car quiet!

Features and Benefits:
- Limits IRS Differential Movement
- Significant Increase in Traction
- Helps with Eliminating Wheel Hop
- No Increase in NVH (Noise, Vibration and Harshness)
- Easily Removable, Not a Permanent Modification
- Includes 80 and 90 Durometer Bushings
- Made In The USA

And they have succeeded in that. You know have the ability to minimize pinion angle changes, noticeably increase traction, and help eliminate wheel hop and differential deflection with this new kit. Made from high-strength urethane to Steeda’s exact specifications and durometers, this kit will arrive with 2 different bushing options. The red “Street” 80 durometer bushings and a black “Performance” 90 durometer bushings. Both bushing options will increase performance with no increase in NVH (Noise, Vibration and Harshness).

Vehicle Fitment:
- 2015-2023 EcoBoost Mustang
- 2015-2023 GT Mustang

Tech Tip: This is designed for street and competition use. For the race-only version, please see 5554440 with Solid Aluminum bushings.

Please Note: This Urethane Adjustable Bushing Insert System is NOT designed for use with 2015-2020 Shelby GT350 and GT350R or 2021+ Mach-1 Mustangs.

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Vehicle Fitment

This product will fit the following Mustang years:

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