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Steeda IRS Differential Bushing Insert System - Street to Full Race Combo Kit (15-18 EcoBoost)

Market Price $189.99 You Save 11% ($20.04)
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  • Item 390075
  • MPN# 555-4444

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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 2018 EcoBoost Mustangs
Limit IRS Differential Movement. Do you lack confidence in your EcoBoost Mustang's Independent Rear Suspension during spirited driving? Well you're not alone. The 2015-2018 Mustang's IRS differential is notorious for moving under rapid acceleration and hard braking. This movement can cause a long list of handling and traction issues, including differential deflection and wheel hop. However, by upgrading to a Steeda Street to Race IRS Differential Bushing System you can significantly limit the movement of your Mustang's IRS to improve the handling performance of your S550 Mustang.

Street, Performance, Race. Steeda engineered their IRS Differential Bushing Insert System with all drivers in mind, including Street, Performance and Race. This Steeda IRS Bushing Kit includes three different options. The red 80 durometer bushings are for the Street. The black 90 durometer bushings are for Performance driving. While the billet 6061 aluminum bushings are intended for Drag Race use. As an added bonus the 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 three different durometer bushings as your driving needs change.

Application. The Steeda Differential Bushing Insert System is specifically designed for use on 2015 to 2018 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 Details

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
Tech Specs
Will it fit my Mustang?
  • EcoBoost - 16, 15, 17

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