Win A 2018 RTR Spec 3 Mustang Enter Now!
Talk to a Mustang Expert
1-888-332-7930
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping! Get it by Dec 24th available on most items - Details

Steeda Sport Springs - Progressive (15-18 GT, EcoBoost, V6 w/o MagneRide)

Market Price $279.95 You Save 11% ($30.00)
Our Price

$249.95 (set of 4)

FREE Shipping
  • Item 390077
  • MPN# 555-8210

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

Features, Video & Details

  • Steeda Sport Springs
  • Lowers Center of Gravity for Improved Handling
  • Lowered Muscle Car Stance
  • Progressive Spring Rate
  • Blue Powdercoated Finish
  • Estimated Drop: Front - 1.125”, Rear - 1.0”
  • Made in the USA
  • Not Compatible on MagneRide Equipped Vehicles
  • Fits 2015-2018 GT, V6 and EcoBoost Mustangs
  • Clears Stock and Aftermarket Wheels & Tires

Review & Installation Video

Review & Install Video

Hey, guys, Stephanie with AmericanMuscle.com, here with the Steeda Sport Lowering Springs for 2015 and up, S550 Mustangs. The Steeda Sport Progressive Springs are gonna be a good option for those of you out there that are looking for a lowering spring for a daily driven car or a street car that has a high-ride quality and still lowers the car. These springs are ideal for the daily driver and some occasional track use as well. These are a progressive spring that's gonna maintain ride quality and provide performance and enhance the looks of the car all at the same time. These springs offer a drop of just over one inch in the front of the car and one inch in the rear. So this is pretty much in line with the drops that a lot of the other springs offer, except a touch lower in the front. So, the lowering spring is gonna lower the center of gravity of the car to provide some handling improvements like reducing squat and body roll in corners and eliminating nose dive under hard braking. The drop that these springs offer is enough of a drop to eliminate the majority of the gap between the tire and the fender, and it's gonna leave the car sitting just above the wheels and tires, with some room to spare. So just for reference, we did install these in our 2015, with 255/40 19s on the front and 305/35 19s on the rear. The drop will look a little different, depending on your wheel and tire set up, and these were installed on our eco-boost [SP]. The majority of the springs out there are offering a one-inch drop, and this may sound small to you but the S550 Chassis doesn't need a huge drop to obtain better looks or an improvement in handling. The S550 responds well to even a one-inch change in ride height. You'd be surprised at how well the S550 Chassis responds to a good set of springs in both the looks and the performance categories. These are gonna be compatible with both the factory and after market wheel and tire setups, which is another nice feature of not having to really dump the car to improve the looks. It's a plus side of the S550s. They look good and respond well to a little bit of lowering so you can create a functional low, meaning low enough to look good but not low enough to cause issues either on the tire or under the car. It's gonna leave you with a very streetable [SP] car still. So, usually, drop, ride quality, and performance are the main concerns when you're shopping for springs. These are a progressive spring, which means they have a progressive spring rate, which means that they're a good option for a street car. They don't have a harsh ride quality but they will firm up as you start pushing the car, which works to give you the best of both worlds between comfortable and functional. Steeda does offer a linear spring as well, if you don't want a progressive spring. So when it comes to ride quality, sometimes you can get a rough ride quality when you start lowering the car more, but that's not the case with these springs. Customers have actually given quite positive feedback on the ride quality of these springs. The ride isn't that much different than stock, besides the car having less body roll and being more planted overall. These aren't a stiff spring, they're more forgiving. The ride will be a little stiffer but it's not gonna be uncomfortable. Overall, these springs are intended for street and occasional track use, so they do give a stiffer than factory ride quality but they're made to not be harsh, so it's still comfortable but also able to perform when you want them to. As far as price, these springs are gonna be right in between the $200 and $300 mark, which is right where the majority of other springs are falling as well. Of course, there are some springs that are either less expensive or more expensive than that, and even springs that are all across this rice range. I will say that these are closer to the $300 mark, though. So the install here is gonna take about four hours, and I'm gonna call it a solid one out of three wrenches on the scale because you will need some knowledge to complete this install. So I'd recommend having the knowledge of a helping hand or taking this to a shop for the install if you haven't done this before, especially since it's always a good idea to get an alignment after the install anyways. This install can be done on jack stands if you don't have access to a lift. But as usual, a lift would be your best bet here. You're gonna need a few tools, including a spring compressor, so you can make sure you have that before you start the install. You're gonna need to get down to the spring and strut assembly, so everything like the wheels, brakes, ABS lines will need to be moved out of the way so you can pull the assemblies out of the car. The spring compressor will help you remove the springs from the strut and install the new front springs which are compressed and installed the same way. The strut assemblies go back the same way they came out, and the install is the same for both sides. The rear is where things are gonna be a little bit different, but nothing crazy here. Essentially, the IRS [SP] subframe will be dropped, along with the rear shock mount so you can slide the rear springs out. Just like the front, the rear springs install the same way that they're uninstalled. There's no surprises here. The bombstop [SP] is slid on to the shock, followed by the factory dust boot. Then the new springs can be installed and the IRS subframe can be bolted back up, and that's about all it's gonna take. Like I mentioned earlier, a fresh alignment after the install isn't a bad idea. Wrapping things up here, the Steeda Sport Springs offer a one and a quarter inch drop in the front of the car and a one-inch drop in the rear. They have a progressive spring rate and they're designed for street and occasional track use. As always, I suggest you check these out more online for yourself, and for all things Mustang, keep it right here at AmericanMuscle.com.

Improves Handling. The Steeda Sport Progressive Springs are ideal for the daily driven, street or even the occasional track use Mustang. Not only does this set of blue powdercoated Steeda Springs lower your S550's center of gravity, but it will reduce squat during acceleration, body roll in the corners and excessive nose-dive under hard braking, all while maintaining a quality ride.

Progressive Rate. Using a progressive spring rate, this set of Steeda Sport Springs provides a softer ride when going over bumps and road imperfections, plus enhancing the handling performance for your S550 Mustang. They will also improve its overall appearance, by lowering the ride height approximately 1.125" in the front and 1.0" in the rear, to eliminate the ugly "4x4" tire to fender gap, for a more aggressive street stance.

Clears Stock and Aftermarket Wheels & Tires. These lowering springs were engineered to be compatible with your stock size wheels and tires, as well as AmericanMuscle's pre-configured wheel and tire combo kits (specific to your generation), to assure proper clearance with no rubbing issues.

Application. This set of four Steeda Sport Progressive Lowering Springs are specifically designed for use on the 2015-2018 GT, V6 and Ecoboost Mustang, including both Fastback and Convertible models.

Technical Note. The Springs are not compatible on vehicles equipped with the MagneRide Suspension.

Note: Coupon codes cannot be applied to this product.

Fitment: 2015 2016 2017 Details

What's in the Box
  • (4) Lowering Springs
Installation Info
Tech Specs
Springs Specifications
Spring Rate: Front: N/A
Rear: N/A
Usage: Street
Year: 2015-2017 GT, V6 & EcoBoost Model: Fastback/Coupe & Convertible
Progressive or Standard: Progressive Estimated Drop:

1.125" F / 1" R

Will it fit my Mustang?
  • GT - 15, 16, 17
  • V6 - 15, 16, 17
  • EcoBoost - 15, 16, 17

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Love it!!

Absolutely love the steeda progressive set up. Not slammed but perfect ride height that eliminates wheel gap. Handles noticeably better. Pair these up with some thicker sway bars and feel the differen ...

Read More
Helpful (6)

5/5
Steeda Progressive Springs

First of all, American Muscle was great as always. I placed my order over the phone on a Thursday and the springs arrived by the end of the day Friday. I took my car to a shop due to not having the ...

Read More
Helpful (4)

Overall Rating 4.8 out of 5 stars
Read All 16 Reviews

Customer Photos (11) Submit Your Photo

View All 11 Photos

You Might Also Like

4 Questions / 3 Answers

Ask a Question

Do you have the spring rates for these, front and rear?

Larry

Can I use these springs with the Ford Performance Street Handling Pack, if I would exchange the Ford Performance springs against these? If yes, would I need camberplates?

DanielW

  • We do not offer a kit that has these springs combined with the Ford Performance Street Handling Pack, however these springs would work with the rest of the kit if you were to purchase these and the Street Handling Pack and swap out the springs. I would recommend caster camber plates as well.

    Doug P

Helpful (0)

Can these springs be used with the factory struts/ all other suspension components?

Tomitheus

  • Hi, These springs can be used with the factory struts, We do suggest upgrading to a set of shocks and struts with adjustable dampening to get the best ride quality.

    Chris J

Helpful (0)

Are caster camber plates necessary to align properly for this set of springs?

Tdero

  • Caster Camber Plates are not required but they are highly suggested. Anytime you change the suspension on the car, you should get an alignment done. The Caster Camber Plates will just give you extra adjustment so that you can get as close to perfect as possible. I recommend going with the Maximum Motorsports Caster Camber Plates (15-17 All), item # 389059, (http://www.americanmuscle.com/mm-caster-camber-plates-2015.html). Maximum Motorsports makes double adjustable Caster camber Plates, which will help get you the perfect alignment. This will also help with even tire wear after you've lowered your car.

    AshleyK

Helpful (0)

More Products You Might Like

Customer Reviews (16) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

  • Handling Improvement 4.733333 4.7
  • Ride Quality 4.8 4.8
  • Appearance 4.866667 4.9
  • Bang For Your Buck 4.866667 4.9



  • 5/5

    December 12, 2016

    Love it!!

    Absolutely love the steeda progressive set up. Not slammed but perfect ride height that eliminates wheel gap. Handles noticeably better. Pair these up with some thicker sway bars and feel the difference.

    Andy

    Year: 2016 Submodel: GT

    Helpful (6)

  • 5/5

    Installation Time: Afternoon

    May 11, 2017

    Steeda Progressive Springs

    First of all, American Muscle was great as always. I placed my order over the phone on a Thursday and the springs arrived by the end of the day Friday. I took my car to a shop due to not having the tools needed at my apartment. They had the car finished in 2 hours, but they did have 2 guys working on it, so roughly 4 hours for the install would be pretty accurate. The improvement in handling was noticed immediately. I have a 2016 GT with the performance package, which initially I thought cornered pretty well. Now the car handles even better in the turns (feels planted, less body roll, etc.), as well as greatly reduced nose dive under hard breaking and less squat under acceleration. These springs are a little stiffer than the stock PP springs, but not enough to ruin a daily driver (my car is my daily). You can feel the road a little more but IMO that's not necessarily a bad thing. As for appearance, the Steeda progressive springs gave my mustang the exact look I was hoping for. With the approximately 1.25" drop in the front and 1" drop in the rear, it creates equal wheel to fender gap and gets rid of that reverse rake. The front bumper/splitter does sit closer to the ground (obviously) but I've gone over plenty of different size speed bumps and transitioned from a flat to inclined surface with zero scraping. I waited about a week after my install before I got the alignment done because I wanted to let the springs settle. The alignment is off, so don't try to save money and avoid getting it done. So after you've read all that, here's the "long story short," I highly recommend these springs.

    JasonH

    Year: 2016 Submodel: GT

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    November 15, 2017

    Excellent Product.

    Love these springs. There were a breeze to install and my car handles great. No more nose dive under hard braking.

    JayP

    Year: 2017 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    August 19, 2017

    perfect stance

    I think the drop with this set is perfect. Not "slammed" - and gets rid of the wheel gap !

    AntonioG

    Year: 2017 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    March 21, 2017

    Love the stance !

    I had the same springs on my ecoboost and put them on my GT as soon as I got it

    Shelbywannabe

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    March 20, 2017

    Steeda Progressive Springs

    Ride quality is very good and aggressive stance would recommend springs to anyone.

    MikeH

    Year: 2016 Submodel: GT

    Helpful (1)

  • 4/5

    September 23, 2016

    STEEDA LOWERING SPRINGS

    DEFINITELY SOMEWHAT SOFTER RIDE THAN THE SR BRAND LOWERING SPRINGS THEY REPLACED . HIGHWAY RIDE IS VERY GOOD, BUT AROUND TOWN IS NOT SATISFACTORY TO ME .

    GINO

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 17, 2016

    The perfect drop!!

    These Steeda springs are amazing. In my opinion they write better than stock and they're extremely easy to install. It took me only a couple hours. It made the car looks so aggressive and took the wheel gap completely away! I would highly recommend them to anybody!

    Michael

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 24, 2016

    Nice drop.

    Had Steeda Progressive Sport Springs installed on my 2016 V6. Was initially concerned about the stated drop as the same springs are sold for both the V6 and (heavier) GT models. I'm very happy with the drop and the stance looks good with stock 18" Foundry wheels. Overall handling is better but at the price of a bit more noise up front - not sure if this is from the product or the install.

    Brobot

    Year: 2016 Submodel: V6

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    March 19, 2016

    STEEDA PROGRESSIVE LOWERING SPRINGS

    The best lowering springs for a mustang gt 100 satisfied.

    YOYO8677

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    January 09, 2016

    Incredible improvement in ride quality and height

    These springs were incredibly easy to install, just follow the included instructions and check any online videos you can. Getting the front upper strut nut in place will be much easier with some air tools, alternately you can buy or make a strut nut tool. The rear springs are easier to get out if you have a friend who can push down on the assembly so you can grab the rear spring out of place. I use these on my daily driver and they are extremely comfortable.

    EricM

    Year: 2015 Submodel: GT Mohnton, PA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    November 29, 2017

    Good value,better look and improved handling

    These springs lowered my 2017 pp GT an inch. It definitely looks better and does lower cg. If you want a mild lowering stance, these are perfect. I use this as a spirited street car and love curves. I own multiple BMW’s(m3’s) and club race one. Does not make me a Mustang expert, but I am pleased with the street ability as well as the performance in turns. Ride up front softer than pp Springs until you lean on it. Springs out back are definitely stiffer and seem to help the bite. I usually run a softer set up on my race car, but the weight of the Stang needs this.. ...pretty ford blue......good value, pleased.

    PhilipF

    Year: 2017 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    September 16, 2017

    Perfect springs for a GT PP

    Very happy with the stance and the ride quality from these springs. I haven't had a chance to push the car to test the handling but it feels about the same as the stock PP suspension

    CraigCC

    Year: 2017 Submodel: GT

    Helpful (0)

  • 4/5

    Installation Time: Less than 1 Hour

    August 08, 2017

    Steeda lowering springs

    Springs handle phenomenal just wish they were .3 or .4 lower in the front. But I'm happy with them all the way

    Ottomanscamber

    Year: 2015 Submodel: GT

    Helpful (0)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    June 10, 2017

    Wheel hop!!!!

    The overall look is amazing really like the stance the springs give the car but they did give me wheel hop every time I "warmed up " my tires .. didn't have much of that with the stock ones .. think with some better shocks I should have better results..

    Jose

    Year: 2015 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    June 05, 2017

    Perfect stance and they feel great

    Gave my mustang a whole new look! Nice and aggressive stance without being too low. They feel great, car has alot less body roll and doesn't squat or brake dive as much now. Install was easy on a lift but can be done on some jack stands.

    Sebastang

    Year: 2017 Submodel: GT

    Helpful (0)

Related Mustang Categories