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Steeda Race IRS Differential Bushing Insert System - Aluminum (15-19 GT, EcoBoost)

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

  • Steeda IRS Aluminum Bushing Kit
  • Limits IRS Differential Movement
  • Improves Traction and Reduces Wheel Hop
  • 6061 Billet Aluminum Construction
  • No Permanent Modifications Required for Installation
  • Designed and Manufactured in the USA
  • Intended for Drag Strip Use
  • Notable Increase in NVH (Noise, Vibration, Harshness)
  • Fits 2015 to 2019 GT and EcoBoost Mustangs
Limit IRS Differential Movement. Hardcore drag racers know if you can't hook up off the line you're going nowhere fast. The IRS differential of the S550 Mustang is well known for moving under rapid acceleration and hard braking. This excessive movement can cause a whole host of traction problems, including differential deflection and wheel hop, leaving you at the starting line just spinning your wheels. However, by upgrading to a Steeda Race IRS Differential Aluminum Bushing System you can considerably limit the movement of your Mustang's IRS to greatly improve traction and eliminate dreaded wheel hop.

Superior Quality. Steeda proudly designs and manufactures their Mustang Race IRS Differential Bushings right here in the USA. These Steeda IRS Differential Bushings are precision CNC-machined from high grade 6061 aerospace quality billet aluminum for superior strength and long lasting durability.

Increase in NVH. Seeing that these Steeda IRS Bushings are made from solid aluminum you will feel a significant increase in NVH (Noise, Vibration and Harshness). Because of this increase in NVH, these Steeda Aluminum IRS Differential Bushings are intended for drag race use only.

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 easily return to stock or install one of Steeda's other IRS Differential Bushings as your driving needs change.

Application. The Steeda Race IRS Differential Aluminum Bushing Insert System is specifically designed for use on 2015 to 2019 GT and EcoBoost Mustangs that are equipped with the factory Independent Rear Suspension (IRS). Does not fit V6 and Shelby GT350 models. Intended for off-road drag race use only.

Note: Coupon codes cannot be applied to this product.

Fitment: 2015 2016 2017 2018 2019 Details

MPN# 555-4440

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (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
Tech Specs
Will it fit my Mustang?

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Customer Reviews (2) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Afternoon

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

  • 5/5

    Installation Time: Afternoon

    April 19, 2018

    You'll get gear whine.

    These along with subframe lockout bushings helped eliminate about 50 of wheel hop.


    Year: 2015 Submodel: GT

    Helpful (5)

  • 5/5

    September 02, 2016

    Greate quality highly recommend

    These are greate quality diff mounts, only thing is that when u install them all the flex that the diff mounts use to handle it all goes to the Cradle mount bushings,. Good thing I also purchased the BMR cradle bushings lockout kit lol. I'm very happy with my purchase.. Highly recommend it as long as u get the lockout kit too


    Year: 2015 Submodel: GT

    Helpful (7)

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