Steeda S550 Mustang Pro Action Adjustable Shocks & Struts GT/V6/EcoBoost (2015-2022)

3 Review(s)
$262.94 (22%)
Steeda's Pro-Action adjustable rear shocks & front struts are the ultimate combination of ride quality and performance. Tested and tuned to achieve optimum compression valving, giving you that quick sports car reaction on the road with easily adjustable r

Part Number: 555 8157

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Searching for the ultimate combination between ride quality and performance for your 2015+ S550 Mustang? Look no further than our Steeda Pro-Action shocks and struts. These dampers feature street and track-proven technology which have been methodically tested and tuned to achieve optimum compression valving, giving you that quick sports car reaction on the road with easily adjustable rebound damping at the twist of a knob. From soft and comfortable to stiff and aggressive, these Pro-Action shocks have more adjustability than you will ever need!

Incorporate your stock or aftermarket spring package to these adjustable dampers for the perfect ride quality. Eliminate the choppy stock ride, reduce dive, squat and body roll, and eradicate wheel hop once and for all! Steeda's Pro-Action dampers are the highest quality twin tube dampers on the market, and include a separate compression piston internally to give you the same compression force as a standard damper with significantly less gas and internal pressures - this means less internal stress on the components, less friction, more repeatability and a lighter overall package! Coupled with our extremely strong steel housing, our twin tube setup provides bulletproof reliability, lower bending loads on the damper shafts and increased performance! As always, our kit is backed by our Steeda limited warranty.

Switch to the Steeda Pro-Action shocks and struts for the pinnacle of performance, ride quality and reliability.

See these shocks in action in our Steeda Q500

Notice how composed our Q500 is throughout this turn at Palm beach International Raceway

Product Benefits
  • Steeda proprietary shock valving
  • Specifically designed for lowered S550 Mustangs
  • Rebound adjustable for the ultimate in tunability
  • Reduce wheel hop, squat, body roll and body oscillation
  • Less damper friction, less side loading on the shafts, lower internal pressures
  • Huge range of tire, wheel, and spring fitment combinations backed with Steeda's limited warranty
Note: The factory shock mount will need to be drilled out to 12mm or the Steeda Billet Shock Mounts can be used. 

CA Residents: Cancer and Reproductive Harm WARNING

Hi everybody Brian from here today to speak to you about our Steeda S550 Pro-Action Adjustable Shocks and Struts. We spent a long time developing the shocks and struts, nearly a year to make certain that the valving was just right and I say just right so it'd be suitable for a wide variety of purposes, from driving the car every day or a weekend warrior car. To an Autocross event, a track day, drag racing as well as create enough performance or improve performance enough to win championships. One of the great things about our struts and shocks is the wide range of adjustment that they offer. You can set them soft so that under compression and bumpy roads they compress nice and easily and then they expand or decompress nice and quickly. This means that the tire and wheel will stay close to the road whether it's a bumpy road a back road, highway bridge transition. It's gonna give you a nice smooth and controlled ride. Likewise when you firm them up it's gonna compress much harder it's gonna take a lot more effort to compress it and it's gonna rebound faster. This means that you're gonna have much better reflexes as you're entering and exiting corners as well as when you're launching to get that ultimate 60 foot time. Speaking of setting these up, it's really easy. We provide the tool and all you have to do is take this tool to the top of the strut or the top of the shock and turn it and when I say turn it you're going to turn it clockwise just soften up the ride or counterclockwise to firm it up. So you can truly set these however you want whatever track conditions whether again if you street driving, driving to an autocross, driving to track days or setting them up for a better 60 foot times. There's a wide range of adjustment it's gonna suit all of your needs. With regards to setting up your car exactly the way that you want it, we offer a Pro Action Shocks and Struts as a set of rears, a set of front or as a full set. These will work with springs that lower the car as much as two inches. You can also use them with factory springs or even better with any of our Steeda Lowering Springs. If you have any questions or comments about these, please feel free to post below. Visit us at to learn more about these and many of our other great products. Subscribe to our YouTube Channel and don't forget to follow us on social media. Speed Matters have a great day!!
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Fitment & Features


Manufacturer: Steeda Autosports

Installation Information:

Level of Difficulty: Difficult
Install Time: About 3 Hours
Tools Required: Basic Shop Tools
Print Instructions: Installation Instructions

Vehicle Fitment:

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

Customer Reviews

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Average Customer Ratings


I totally redone my suspension on my 2016 GT with steeda parts due to very bad tire wear and pirellis are not cheap including these adjustable shocks, the only thing I would like better is to have a more positive adjustment feel like a click /notch system instead of counting turns to me that would be more precise and easier to adjust especially on the rear.Other that that excellent products
Did you find this helpful?  6 of 8 Found Helpful
Pro Action Struts and Shocks
Pro Action Struts and Shocks are what I needed . Togeather with the progressive lowering springs the car is more stable at any speed. Being able to adjust for soft and firm ride are a plus with the package!
Did you find this helpful?  10 of 10 Found Helpful
Verified Buyer  
Very impressed
Directions were fantastic. Shocks and struts fit great. The ride with the GT350R springs is incredible! Can't wait to get on an autocross and/or road course to see just how much difference they make. Thanks Steeda!
Did you find this helpful?  7 of 8 Found Helpful
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