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Steeda IRS Differential Bushing Insert System - Street to Full Race Combo Kit (15-19 GT)

AmericanMuscle no longer carries the Steeda IRS Differential Bushing Insert System - Street to Full Race Combo Kit (15-19 GT). Please check out 2010-2014 Mustang Control Arms for an updated selection.
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Features & Details

  • Steeda Street to Full Race IRS Bushing Kit
  • Limits IRS Differential Movement
  • Improves Traction and Reduces Wheel Hop
  • Urethane Bushings - No Increase in NVH (Noise, Vibration, Harshness)
  • Aluminum Bushings - Intended for Drag Strip Use
  • Includes Red Urethane, Black Urethane, and Billet Aluminum Bushings
  • No Permanent Modifications Required for Installation
  • Designed and Manufactured in the USA
  • Fits All 2015 to 2019 Ford GT Models
Limit IRS Differential Movement. Do you doubt the competence of your Mustang's traction and operational performance? You want your 2015-2019 GT to be well recognized for spirited driving, hard braking and even moving under acceleration. This Steeda IRS Differential Bushing Insert System - Street to Full Race Combo Kit can profoundly enhance the progress of your GT model to boost functionality.

Race, Performance, Street. This Steeda IRS Bushing Kit involves 3 different alternatives: the billet 6061 aluminum bushings designed for a drag race, the black 90 durometer bushings (performance driving), and the red 80 durometer bushings (street). Furthermore, the urethane bushings will not increase the NVH (noise, vibration, harshness) of your Mustang.

Straight Forward Installation. The Steeda IRS Differential Bushing Insert System is constructed to install with just basic equipment in less than an hour. No special equipment or additional tools are required for a direct installation.

Application. The Steeda Differential Bushing Insert System is strictly designed for all 2015 to 2019 Ford GT models.

Fitment: 2015 2016 2017 2018 2019 Details

MPN# 555-4442

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
  • (4) Aluminum Race 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
Will it fit my Mustang?

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Customer Reviews (1) Write a Review

Overall Rating 4

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 5 5
  • Fit 5 5

  • 4/5

    Installation Time: Less than 1 Hour

    May 09, 2018

    Worth money, great performance

    I installed the red ones, I must say I love the ride, it did stiffen up the rear in a great way. I did gain some NVH, when I have load on the differential I can hear the gear whine transfer to car. When I get off the gas the whine stops, it’s not loud but it is annoying to me, my wife doesn’t seem to hear it so that’s good. The performance upgrade was completely worthwhile and I recommend the upgrade. I only gave it 4 stars because of the whine.


    Year: 2015 Submodel: GT

    Helpful (9)

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