Steeda Mustang Strut Tower Brace GT/EcoBoost (2015-2022)

12 Review(s)
$35.00 (14%)
Steeda's S550 Mustang Double-Bar Strut Tower Brace is an easy to install part that will stiffen up the handling of your car as well as improve ride quality.

Part Number: 555 5731
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Steeda's S550 Double-Bar Strut Tower Brace is made specifically to work with your 2015+ Ford Mustang GT and EcoBoost (all models: Performance Pack, non-Performance Pack, 20" wheel option).

Our S550 Steeda Strut Tower Brace for the 2015+ Mustang GT and EcoBoost is made from high-strength chrome-moly steel and powder coated wrinkle black. This easy-to-install bar will stiffen up the front end of your Mustang to improve vehicle handling.

Completely designed and constructed in the United States of America. Easy-to-install and a great-looking piece for under your hood.

Please Note: Does not fit the 2015-2019 Mustang V6. It fits all RH (right-hand) drive models that are not V6. Does not fit the Mach 1 Track-Package with factory adjustable camber plates installed. Steeda's 555-8139 adjustable camber plates must be used with this brace in order to achieve proper fitment. 

Purchase your Steeda S550 Strut Tower Brace for your 2015+ Mustang GT and EcoBoost at Steeda Autosports today!

Product Benefits
  • Improves front chassis stiffness
  • Improves ride quality over rough surfaces
  • Improved vehicle handling
  • 10% lighter than the factory Ford Strut Tower Brace
  • Allows easy access to the oil dipstick

CA Residents: Cancer and Reproductive Harm WARNING

Hi everybody Brian from Steeda. Showcasing our Strut Tower Brace for the S550 Ford Mustang as well as the Shelby GT350. The Strut Tower Brace is exactly as it's named. It's a brace that spans the distance and ties the Strut Towers together. Very similar to the Steeda G-Trac Braces that tie in the K-Member underneath the car. This Strut Tower Brace is designed to add chassis rigidity and it's going to be and it'd going to be most beneficial when you're throwing your Mustang around corners. Alright, brace yourselves for some real information! All joking aside, we like to have fun with this but more importantly, we love to improve the Mustang! The Strut Tower Brace does a great job of tieing in the upper strut mounts. Lets put this into lame mans terms, as you're throwing your car around a corner the outside tire loads the inside tire lifts. That's just the natural way this is going to happen. Your momentum is carried through the corner, weight is going to transfer to the outside. What this does is, it creates a lean in the chassis because you're loading the outside front tire the inside is lifting. So as you're loading the outside the Strut Tower wants to push in a little bit and as the other side is lifting it actually wants to pull out a little bit. What does this ultimately do? It changes the ultimate angle of the suspension. Take a look at any footage of Glen or Dario piloting the Red 2018 Q500 HPDE Car or our Yellow SCCA Road Race Car and you're going to notice right away as they are going through corners or popping off of curbs especially the slow-mo footage that we've got. You'll see that the front wants to even twist a little bit. The Strut Tower Brace is an integral part and it's so integral that for the Performance Pac Cars and the GT350's it's equipped with a Strut Tower Brace from the factory. So for thoughts of you that have cars whether it be EcoBoost or a standard GT and have no Strut Tower Brace, this is a must have for you. So if your looking for a great way to improve the feel of the car and give you better steering feedback whether it's on canyon roads, an autocross event or track days an in particular if your car didn't already come with a Strut Tower Brace definitely look into this. Even better the Steeda Strut Tower Brace is inexpensive and very simple to install. It's backed by our lifetime warrenty and we proudly manufacture this in the USA at our Valdosta Georga facility. Because Speed Matters! If you had the opportunity to push your Mustang to the limit before and after installing a Strut Tower Brace definitely post below so that our viewers can see your feedback. Also if you enjoyed the content of this video please click like and share it with other enthusiasts. We've spent a lot of time highlighting the performance benefits of adding the Steeda Strut Tower Brace to your Mustang. Although this is a really pretty piece and will know doubt will get attention when you pop the hood that's not what we designed it for. We designed it for when you are pushing your Mustang. More importantly to give you better feedback and feel. Steering feedback that's oh so important when you're pushing your car through the corners. Whether it be an autocross event, a track day or just a canyon carving when you're pushing your car to the limits it's cornering limits, this will benefit you. In feel and ultimately confidence. For the latest and greatest in how we're pushing our Mustangs to the limit be sure to check us out on our Social Media Channels. If you'd like to learn more about the Strut Tower Brace as well as the many other products we offer for the Ford Mustang and other Ford vehicles visit us at Thank you so much for watching and have a fantastic day!
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Fitment & Features


Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information:

Level of Difficulty: Easy
Install Time: About 5 Minutes
Tools Required: Basic Shop Tools
Print Instructions: Installation Instructions
Install Video:

Vehicle Fitment:

Fits Model Year: 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022

Customer Reviews

Rating Snapshot

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Average Customer Ratings


Excellent Brace
Installed this with the Ford Performance cowl brace and the front end cleaned up real nice. The addition of the G-Trac K Member Brace gives the car an excellent steering feel. Much better than stock.
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Verified Buyer  
Strut Tower Brace Review
Installed brace on my 2017 ecoboost convertible and there is a noticeable difference for the better. Wish I had done this a lot earlier. The front suspension works better and there is reduced cowl shake. This part should have been installed straight from the factory. Only downside was the Steeda plate was not in the shipment and so I have not been able to show this off. Makes no difference to the performance though. Highly recommended.
Did you find this helpful?  4 of 4 Found Helpful
Solid made part. Easy install. Take your time and don’t drop anything into engine bay - tuff to find. Only noticed slight difference in handling.
Did you find this helpful?  4 of 5 Found Helpful
Simple fast install in under 20 minutes.
Did you find this helpful?  5 of 5 Found Helpful
Verified Buyer  
2017 Ecoboost Improved handling.
First off very fast shipping, Quality was as expected from steeda for a powder coated part, install was simple, good instructions included. took maybe 20 min for install, and that was mostly looking for my sockets, this is easily a 10-15 minute job. I noticed the difference on my stock ecoboost taking corners faster. giving this product A+ for looks and easy install! lets not forget to mention it fresh-ins up the look of your ecoboost engine compartment, people love seeing it at the shows.
Did you find this helpful?  11 of 12 Found Helpful
Verified Buyer  
Beautiful Design **BUT BE SURE TO USE ANTI-SEIZE** on the Stainless Hardware
Love how this looks, feels, and fits!! Install was very straightforward but only hindered when I didn't have/use ANTI-SEIZE Lubricant on the included Stainless Steel nuts. Had 2 nuts seize on the strut mount and had to cut them off and then replace the strut mount... lesson learned... Combined this with the G-Trac Brace and Progressive Springs and the difference is REAL! Side Note: Steeda, it would be extremely helpful to include a small package of ANTI-SEIZE to prevent this problem from happening to others, even if it's use is included in the instructions.
Did you find this helpful?  5 of 5 Found Helpful
Steering is more efficient and responsive
I already have the stage 1 handling package (progressive sport springs and sway bars) on my 2015 Ecoboost, and was amazed at the steering feel after this install. It's super responsive now and takes less effort to accomplish more when steering into curves at any speed. Doesn't hurt that it looks awesome, too!
Did you find this helpful?  18 of 18 Found Helpful
Noticed improvement in cornering feel
I have added the Steeda tower brace and extreme g-trac lower brace. I don't plan to autocross, but I do like to rush through a corner now and again. I noticed improvement in cornering FEEL. Whether this translates to faster cornering speed or not, I haven't checked. The best I can explain the change in feel - It's like upgrading your tires to a stiffer sidewall/lower profile. There is less chassis compliance and spongyness mid corner to confuse my brain that I'm close to the handling limit.
Did you find this helpful?  17 of 17 Found Helpful
Really cleans up the engine bay
Replaced my oem strut brace with the Steeda one, now that they have revised it to work with the performance package GTs! I also plastidipped the overlflow tank. Really cleans up the engine bay.
Did you find this helpful?  5 of 5 Found Helpful
The design allows for easily removing the oil dipstick
I went with the Steeda version primarily because the design allows for easily removing the oil dipstick... I can just pull it straight up through the gaps between the bars without it touching anything. The Ford Racing (OEM) version is not as well thought out.
Did you find this helpful?  18 of 18 Found Helpful
Super easy installation
Installed the new Steeda Strut Tower Brace that supports cars with the factory 20 option. Super easy installation. Best part is that the Steeda version allows easy access to the oil dipstick!
Did you find this helpful?  16 of 17 Found Helpful
Amazing product with super easy install that will blow your mind with the difference in rigidity in the corners I mean night and day!! If you didn't get the stock strut tower this is a must have!! It really brings the front end on cornering!! Glad you liked it, thank you for choosing Steeda!
Did you find this helpful?  18 of 18 Found Helpful
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