Steeda IRS Subframe Bushing Support System Mustang 2015-2024

97% of 100


  • Increase in Traction
  • No Permanent Modifications
  • 6061 Machined Aluminum
  • No Increase in NVH

Steeda IRS Subframe Bushing Support System for 2015, 2016, and 2017 V6 Mustangs, for 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 and 2024 EcoBoost and GT Mustangs, for 2020, 2021, and 2022 Shelby GT500 Mustangs, and for 2024 Dark Horse Mustangs.

Steeda has been extremely busy with the development of new products for the new 2015-2024 Mustangs. And with that, one of their main focuses has been a turn-key, easy-to-install wheel hop/IRS subframe solution for your S550. And we believe they hit the nail on the head with their new IRS Subframe Bushing Support System!

Steeda's IRS Sub Frame Bushing Support System is designed to fit your V6, EcoBoost, GT, Shelby GT500, or Dark Horse Mustang and to provide a much more solid feel with no increase in NVH at all. The Steeda IRS Subframe bushing support system will also eliminate rear subframe movement which is notorious in the S550 Mustang. A stiffened subframe will allow a significant increase in traction at the rear wheels and help eliminate almost all noticeable wheel hop.

Features and Benefits:
- Significant Increase in Traction
- Does Not Cause Unwanted NVH (Noise, Vibration and Harshness)
- Easy, Do-It-Yourself Installation
- Requires No Permanent Modifications
- Completely Reversible Back to Stock
- Patent-pending with a Lifetime warranty from Steeda
- Includes All Necessary Hardware and Detailed Installation Instructions

The Steeda 2015-2024 Mustang IRS Sub Frame Bushing Support System for your S550 V6, EcoBoost, GT, Shelby GT500, or Dark Horse is made from CNC machined 6061 aluminum. This support system is very easy to install, with basic hand tools, even on jack stands in your driveway or garage. As an added benefit, this bushing kit does not require any permanent modifications to your car, and installation can be reversed just as simple as it was installed.

When completely stock, your entire rear IRS subframe assembly will move around under acceleration, braking, and even more so when slamming gears or spirited driving. This is a huge concern due to the fact that every single rear suspension piece is connected to your rear subframe. Every suspension component is moving around so violently that it makes it very hard for your suspension to work properly and keep the tires planted on the pavement for traction the way it was designed. These issues can cause unwanted changes in camber and toe which leads to unpredictable traction and control, resulting in handling issues.

Vehicle Fitment:
- 2015-2017 V6 Mustang
- 2015-2024 EcoBoost Mustang
- 2015-2024 GT Mustang
- 2020-2022 Shelby GT500 Mustang
- 2024 Dark Horse Mustang

*NOT designed to be used with Shelby GT350/GT350R or Mach-1 models.

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

Today we're going to take the first step in combating wheel hop on my 2018 Mustang GT with help from Steeda.

This Steeda IRS Subframe Bushing Support System's going to fit any 2015 through 2018 GT, V6, or EcoBoost Mustang. What these are going to do is they're going to install on the factory rubber bushings that hold the subframe to the chassis. That'll get rid of a lot of the movement of the subframe which causes a lot of the wheel hop issues. This is going to be fairly straightforward to install, and today we're going to show you how to do it.

For this installation, you'll need a lift or a Jack and Jack Stands, 3/8" Ratchet, 13 millimeter Socket, a 5/32" Allen Key or Socket, 1/2" Ratchet, 21 millimeter Socket, 6" Extension, Torque Wrench, and a small Flathead Screwdriver, or a small Pry Bar.

To install the bushing support system, we have to lower down the subframe, and we're going to do one side at a time to keep the subframe alignment. What we're going to do is just loosen up the rear bolt, and then we're going to remove the front bolt. Now what you want to do with this bolt is you want to loosen it to the point where you can get the subframe down approximately one 1". We're starting up here with the front, and what you want to do is remove these two bolts first, and then remove the subframe bolt so the whole bracket can come off with the larger bolt.

These are going to be the front inserts we're going to install. Now this one here is the lower, this is actually pretty obvious for the front. This one, the rear actually looks exactly the same, but is a little bit thinner, so you want the thicker one for the front.

Where we're going to install the front here, you can see how you have these edges. They actually match the rubber bushing. There's going to be an insert in the bushing that this lip will go into. Basically turn it until it's flat. Then the metal will actually touch the frame when it's bolted back in. Then the lower simply goes around the rubber. Push it on into place, now we can reinstall the bracket and the bolt. At this point, just get everything tight, we'll go back and torque it to spec when we're finished.

Now with the front tight, now we're going to remove the rear subframe bolt that we loosened earlier. In case you're wondering about these sleeves, this is part of the Steeda Subframe Alignment Kit, we have another video on this, definitely an excellent product for your IRS. Now this is the upper for the rear bush, again be very careful with this. The thinner ones go in the rear, the front looks exactly the same but it is thicker. Make sure the thick part goes in the front. Again, there's grooves just like the front.

Now for the lower reinforcement collar, we're going to put a little bit of lubrication in here, will make it easier to get this on. We'll start with the inner part of the collar which is going to be the small section here, and you want to make sure the groove is facing up, and this you sort of just have to get it in here and kind of work it in. Small flathead screwdriver will definitely make it easier.

Now you want to put the second piece of the collar into place, again make sure the groove is going upward. Once you get it lined up, install the bolts to draw it in. Make sure you tighten these down, you want to tighten both sides kind of evenly so you don't get it crooked. And now you can reinstall the sleeve and the bolt. You want to repeat the process on the other side, and we'll go back and torque all the bolts to 129 foot-pound. Once they're torqued to 129 foot-pound, your installation is finished.

The Steeda IRS Subframe Bushing Support System is an excellent idea for any 2015 through 2018 Mustang. Like I said, I had this on my 2015, it did a great job of getting rid of the wheel hop, and I'm sure it will do the same thing on the 2018 as well. The installation's pretty straightforward, as an added bonus, there's going to be no increase in any noise or vibration with installing this. As far the install goes, go ahead and give yourself about an hour and a half to two hours, you'd be back on the road in no time.

Vehicle Fitment

This product will fit the following Mustang years:

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