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Steeda IRS Differential Bushing Insert System - Urethane (15-19 EcoBoost)

AmericanMuscle no longer carries the Steeda IRS Differential Bushing Insert System - Urethane (15-19 EcoBoost). Please check out 2015-2019 Mustang IRS Components for an updated selection.
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Features & Details

  • Steeda IRS Urethane Bushing Kit
  • Limits IRS Differential Movement
  • Improves Traction and Reduces Wheel Hop
  • No Increase in NVH (Noise, Vibration, Harshness)
  • Street - Red 80 Durometer Urethane Bushings
  • Performance - Black 90 Durometer Urethane Bushings
  • No Permanent Modifications Required for Installation
  • Designed and Manufactured in the USA
  • Fits All 2015 to 2019 EcoBoost Mustangs
Limit IRS Differential Movement. If you're like many other EcoBoost drivers you know your Mustang's Independent Rear Suspension is in need of a helping hand. It is well know that 2015-2019 Mustang's IRS differential likes to move under rapid acceleration, hard braking and during spirited driving. This movement can cause a whole host of handling and traction issues, including differential deflection and wheel hop. However, by upgrading to a Steeda IRS Differential Urethane Bushing System you can greatly limit the movement of your Mustang's IRS to improve traction and handling performance.

Street and Performance. Steeda engineered their IRS Differential Urethane Bushing Insert System with Street and Performance drivers in mind. This Steeda IRS Bushing Kit includes two different options. The red 80 durometer bushings are for the Street use. While the black 90 durometer bushings are intended for Performance driving. As an added bonus these urethane bushings will not increase the NVH (noise, vibration, harshness) of your ride.

Straight Forward Installation. The Steeda IRS Differential Bushing Insert System is designed to install with just basic hand tools in under an hour. No extra modifications or special tools are needed for a straight forward installation. Seeing that no permanent modifications are required you can switch between the two different durometer bushings as your driving needs change.

Application. The Steeda IRS Differential Urethane Bushing Insert System is specifically designed for use on 2015 to 2019 EcoBoost Mustangs that are equipped with the factory Independent Rear Suspension (IRS). Not for use on V6 or GT models.

Note: Coupon codes cannot be applied to this product.

Fitment: 2015 2016 2017 2018 2019 Details

MPN# 555-4443

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (4) Red Street 80 Durometer Urethane Bushings
  • (4) Black Performance 90 Durometer Urethane Bushings
  • (2) 110mm Bolts
  • (2) 65mm Bolts
  • (2) 35mm Bolts
  • (2) Front IRS Bushing Spacers
  • (2) Rear IRS Bushing Spacers
  • (4) Large Washers
  • (2) Small Washers
Installation Info
Tech Specs
Will it fit my Mustang?

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Customer Reviews (1) Write a Review

Overall Rating 2

out of 5 stars

Installation Time:Afternoon

  • Handling Improvement 2 2
  • Fit 5 5
  • Bang For Your Buck 2 2

  • 2/5

    Installation Time: Afternoon

    November 27, 2016

    Wheel Hop

    Worthwhile in terms of this being one piece of the puzzle. Had horrible wheel hop at the strip with a 16' Ecoboost. I believe these bushings in conjunction with vertical links and some subframe reinforcement would do the trick. These alone, made no perceivable difference in addressing wheel hop. But with a few other items it will complete the need!


    Year: 2016 Submodel: Ecoboost

    Helpful (4)

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