Steeda S550 Mustang Rear IRS Subframe Support Braces

€359 exc TAX

The Steeda IRS Subframe Braces add rigidity to your S550 Mustang's rear end as a simple bolt on upgrade. One of our most popular parts with 13,000+ sold! By connecting the rear together the braces not only add rigidity that was lacking in the rear, but also more control of the whole car. Homologated for European use

As a guide, EU delivery cost varies on service requested and weight / dimensions. Final rate depends on which EU Zone you are in for DPD services. Below are some guide examples. 

Some countries may be serviced with other providers if required.

FREE SHIPPING is available on orders over a certain amount (country dependant). Some product do not qualify for the free shipping offers due to the weight / size of the item. 

We aim to ship same day if ordered before midday.

1. Standard EU Shipping: DPD Courier with tracking - 2-3 days (for main EU countries)

DPD Zone 1: €14.99 + vat 0-5KG      - €19.99 5-30 KG

2. Small Items (via Royal Mail) -from 2 days - 2 weeks depending on location.

Covers all European countries:  €14.99 + vat 0-2KG:

You will receive a shipping notification with tracking details once order is processed.

NOTE  We can ship worldwide. Please contact us if assistance required as a custom shipping solution may be required.

We reserve the right to change charges and services as required.

With the release of the new S550 Mustang, Steeda knew that addressing the IRS system would be a top priority. Being the first production Mustang with an IRS since the 03/04 Cobra's, we knew there would be a great opportunity to capitalise on Ford's new piece by giving it the Steeda advantage. As with any suspension system, deflection is an issue if it's present. Anytime a piece is moving, twisting or vibrating when it should be stationary is a major problem. One of the areas team Steeda wanted to focus on was the rear IRS sub frame.

As you have seen with our IRS Sub frame Bushing Support System, it limits the movement of the sub frame by filling in the voids of the OE bushings. With Steeda's IRS Sub frame Support Braces, we have taken the S550 Mustang rear suspension to another level!

Our Steeda S550 Mustang Rear IRS Sub frame Braces for 2015 Mustang GT and EcoBoost (non-convertible) is built in-house from 4130 chrome moly steel and powder coated silver metal flake, this part isn't only strong - it also looks great under your new Mustang! What we did was tie together 3 very important points on the S550 chassis. We utilised existing threaded holes in the rocker panel (the strongest part of the body) and connected that to the front mounting location of the IRS sub frame and the rear mount of the lower control arm and toe link. Connecting these 3 points together not only adds rigidity that was lacking in the rear, but also more control of the whole car.

Also, unlike competitors kits that  only replace the factory bracket, our Steeda kit supports that bracket while connecting to 2 additional locations, therefore providing twice the support! The best part about this kit is it uses all existing holes in the chassis so the car doesn't have to be modified in any way and adds no NVH whatsoever.

Homologated / Certified for European use

Product Benefits

  • Better handling for more stable cornering
  • Limits IRS sub frame movement
  • No permanent modifications necessary
  • No added NVH
  • 50% more connecting points
  • Reduces wheel hop
  • Fully compatible with Steeda's popular Jacking Rails
  • Lifetime warranty
  • Homologated / Certified for European use
  • Normally in stock

What is wheel Hop?


Part number:  555-5754 - Homologated / Certified for European use

V8 & Ecoboost, Manual and automatic
Not For Convertible 

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