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Steeda IRS Subframe Alignment Kit (15-18 GT, EcoBoost, V6)

Market Price $44.99 You Save 11% ($5.04)
Our Price

$39.95 (kit)

FREE Shipping on orders over $49
  • Item 390070
  • MPN# 555-4438

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Steeda IRS Sub Frame Alignment Kit
  • Aligns Subframe to Chassis
  • CNC Machined Delrin Bushing Sleeves
  • No Increase in NVH (Noise, Vibration, Harshness)
  • No Permanent Modifications Required for Installation
  • Designed and Manufactured in the USA
  • Fits 2015 to 2018 GT, EcoBoost and V6 Mustangs
IRS Alignment Kit. Does it feel like your 2015 to 2018 Mustang is driving down the road sideways? Well it could be, a number of S550 Mustangs left the factory with misaligned rear IRS subframes. For some odd reason the IRS subframe mounting holes are much larger than the mounting bolts. This difference in sizes can cause the subframe to be misaligned by up to as much as a half inch to the left or right. This Steeda IRS Subframe Alignment Kit includes four sleeve bushings that act as spacers to fill the extra space around the factory bolts. These sleeves will prevent the subframe from moving, allowing for a proper alignment.

Delrin Bushing Sleeves. Steeda IRS Subframe Alignment Bushing Sleeves are proudly designed and manufactured right here in the USA. These IRS Differential Sleeves are precision CNC-machined from a high quality Delrin material for superior strength and long lasting durability. Delrin is an extremely stiff thermoplastic that features a very low coefficient of friction making it the perfect material for automotive bushings.

No Increase in NVH. Seeing that these Steeda IRS Alignment Bushing Sleeves are made from Delrin you will not feel any increase in NVH (Noise, Vibration and Harshness). Because there is no increase in NVH, this Steeda IRS Subframe Alignment Kit is ideal for street, performance and race applications.

Straight Forward Installation. The Steeda IRS Subframe Alignment Kit 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. Please note that an alignment, by a qualified shop, will be required after installation.

Application. The Steeda IRS Subframe Alignment Kit is specifically designed for use on 2015 to 2018 Mustangs that are equipped with the factory Independent Rear Suspension (IRS), including the V6, EcoBoost and GT models.

Note: Coupon codes cannot be applied to this product.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (4) Bushings
Installation Info
Will it fit my Mustang?
  • V6 - 16, 15, 17
  • GT - 16, 15, 17
  • EcoBoost - 16, 15, 17

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Eliminates a lot of the wheel hop

This is a must have product for the S550. I installed this with the Steeda Progressive springs. The install of the alignment kit is pretty easy. We had to drop the sub to get the springs in. As far as ...

Read More
Helpful (2)

5/5
Does what it's supposed to.

This probably my favorite product from steeda. Even though I've only tried their CAI and transmission bushing insert. This does exactly what it's supposed to. I was blown away by how much slack there ...

Read More
Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 16 Reviews

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3 Questions / 3 Answers

Ask a Question

Will these fit GT convertibles?

Tech1

  • The Steeda IRS Subframe Alignment Kit can be installed in GT Convertibles.

    Rob D

Helpful (0)

Can I use this alignment kit along with the Steeda IRS Subframe Bushing Support System?

JohnT

  • The Steeda IRS Subframe Alignment Kit is specifically designed for use on 2015 to 2017 Mustangs that are equipped with the factory Independent Rear Suspension (IRS), including the V6, EcoBoost and GT models.

    AM MikeW

Helpful (0)

Are these compatible with the Steeda IRS Subframe Braces?

kyleS550

  • yes

    Anonymous

Helpful (0)

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Customer Reviews (16) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Handling Improvement 4.714286 4.7
  • Fit 4.857143 4.9
  • Bang For Your Buck 4.714286 4.7



  • 5/5

    Installation Time: Less than 1 Hour

    April 04, 2016

    Eliminates a lot of the wheel hop

    This is a must have product for the S550. I installed this with the Steeda Progressive springs. The install of the alignment kit is pretty easy. We had to drop the sub to get the springs in. As far as install just take the bluish colored bolts out and slide the sleeve in and replace the bolt. That's it, piece of cake. Shouldn't take more than 15 minutes As far as handling, the rear feels much more planted. I did a couple of quick shifts into 2nd and the car wasn't trying to go sideways anymore. No brainer mod that really does the trick and keep things centered.

    ShouldhavegottheGT

    Year: 2016 Submodel: GT

    Helpful (2)

  • 3/5

    Installation Time: Less than 1 Hour

    October 03, 2017

    Won't work with BMR IRS Lockout Kit

    This is a good product. But it won't work with the BMR IRS Cradle Bushing Lockout kit. Unfortunately, that isn't mentioned in the description. I figured it out the hard way. Steeda does make an Alignment Kit that works with the BRM Lockout Kit. Item 398196 / MPN# 555-4447 And it works great!!! Too bad I had to purchase both to figure it out.

    TJK

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 26, 2016

    Does what it's supposed to.

    This probably my favorite product from steeda. Even though I've only tried their CAI and transmission bushing insert. This does exactly what it's supposed to. I was blown away by how much slack there is around the rear subframe bolts. I had some vibrations from my 1pc aluminum driveshaft and after installing the steeda locating sleeves, it lessened the vibrations.

    Kyle

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    September 25, 2016

    These should have come on the car.

    The kit make a big difference in the feel and control of the car. If your doing the springs, your already taking the bolts out, so this is an easy upgrade.

    Trustyrusty436

    Year: 2012 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    June 06, 2016

    Steeda bushing

    Work really well and square up the rear end perfect!

    PCooper

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    November 25, 2017

    works great

    Makes it a lot easier to installs rear subframe in the car

    franko2

    Year: 2015 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    November 07, 2017

    steeda IRS alighnment kit

    this product much like any other steeda product is of superior quality and perfect fit and finish. I recommend this for anyone looking to create a more stable and balanced ride along with better driver confidence at the wheel! you will need to do an alignment after installing this kit in order to make sure the subframe the body and your wheels are all aligned correctly. Worth the price!

    Hovo

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    October 13, 2017

    Very easy

    really easy to install. great piece of mind to let you know your rear sub frame is centered to the body. It is almost mind blowing why there not standard. my frame was pretty much centered from the factory but the gap could lift an eyebrow esp if your IRS was not as centered as mine. but still 5 stars in my book and a must have!!!

    WilliamJ

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    September 26, 2017

    fits like a glove, easy install

    easy install, followed the directions, with the help of a youtube video from the competitor website. regardless, it was helpful. paired with the Steeda IRS subframe bushing, my car feels a bit more grounded with minimal NVH.

    GABRIEL

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    September 19, 2017

    Great kit

    These bushings were really easy to install. Rear end feels solid to the ground

    Jester

    Year: 2015 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    September 13, 2017

    These are great!

    These corrected every issue I had with rear alignment after getting coilovers installed.

    JasonD

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    July 05, 2017

    Just what I needed

    This kit worked perfectly to align the rear of my 17 mustang.

    ChadM

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    May 20, 2017

    Steady as she goes!

    With a set of 305 nitto's and this mod well on the way to stability and traction. Worth the time and money!

    MichaelB

    Year: 2016 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    May 04, 2017

    Awesome

    Lined the rear up perfectly. Everything is square now and it was a pretty easy install.

    90FS

    Year: 2016 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    April 25, 2017

    Simple and effective

    I was surprised to see that my subframe was out of alignment by a quarter inch. Installation was easy but now I need a front end alignment. No worries its all good.

    BillieN

    Year: 2015 Submodel: GT

    Helpful (0)

  • 4/5

    August 08, 2016

    Maybe For Competition

    Good quality product. They did not change the ride or handling on my car. Maybe best for use on track cars.

    JohnnyC

    Year: 2016 Submodel: V6

    Helpful (0)

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