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Eibach Pro-Kit Lowering Springs (15-17 GT)

Market Price $294.30 You Save 10% ($29.43)
Our Price

$264.87

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  • Item 384456
  • MPN# 35145.140

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Features, Video & Details

  • Aggressive Stance
  • Improves Handling
  • Lowers Center of Gravity
  • Progressive Spring Rate
  • Coupe Drop: Front - 1.1” Rear - 1.0”
  • Convertible Drop: Front - 1.2” Rear - 1.1”
  • Fits 2015-2017 GT Coupe and Convertible Mustangs
  • Clears Stock and Aftermarket Wheels & Tires.

Review & Installation Video

Review & Install Video

Hey, guys, Stephanie with AmericanMuscle.com, here with the Eibach Pro-Kit Lowering Springs for 2015 and up S550 GT Mustangs. The Eibach Pro-Kit lowering springs are going to be a good option for the S550 GT owners out there who are looking for a lowering spring that's going to improve the looks of the GT, but also still has a comfortable ride quality as well. And for those of you that don't mind spending a few dollars more for these qualities. Lowering springs have a big impact on the S550, as they can completely change the looks of the car, but at the same time, a lowering spring isn't always just about lowering a car. Any lowering spring can lower the car, but the Eibach Pro-Kit is designed with handling in mind as well, which makes them a great choice for those that are concerned with improving handling, and keeping as comfortable of a ride quality as possible. These are progressive-rate springs, which concentrate on providing balance at all times, in order to improve handling, and they're going to lower the car just over one inch in the front, and one inch in the rear. The drop will change slightly, depending on if the car is a coupe or convertible, due to the weight differences between the models. This drop's going to eliminate a lot of the wheel gap that the GT has from factory, and it's doing to leave the car sitting just above the tires. A one inch drop is pretty standard across the board for the S550, and like I said, a one inch drop is pretty significant for these cars. But I wouldn't say that this is a huge drop, so if you're looking for more drop, Eibach does have the Sportline springs that will drop a half inch more, but they will ride differently than the Pro-Kit. They're just a little bit more aggressive spring all the way around. Now I said that the one inch drop with the Pro-Kit is significant for the S550, and I mean significant in both looks and performance changes. This drop will lower the car's center of gravity enough to have handling benefits and some traction benefits. Squat is reduced during acceleration, and so is some of the wheel hop that the car has. The springs are also going to help with body roll in the corners, and nose dive during braking. All of this means that these springs are generally speaking going to tighten up and improve handling in nearly all aspects. The Pro-Kit's also a great option for the daily drivers out there that aren't going to drop the car so low that it's difficult to drive places, but they are going to drop it enough to improve looks and handling. They're also that progressive spring rate that I mentioned earlier, so they aren't going to have a harsh ride quality, and that's why I consider these one of the best springs for the dailies. I would consider the ride quality nearly equal to the factory ride quality, slightly stiffer, but really nothing to complain about, and I don't have anything negative to say about it. I do want to say that a lot of times when you're shopping for lowering springs, you're also shopping for things like adjustable caster camber plates, and a new set of both shocks and struts. In this case, I wouldn't say that caster camber plates are required. The drop is only just over one inch, so in all reality, the ability to get the alignment within spec is still there with the small drop. If these were the Sportline springs that were dropping you one and a half inches, I might suggest caster camber plates. It never hurts to have a set of adjustable plates though, so if you've got the extra cash, I'd say go ahead. They're just not required in this case. As far as shocks and struts, this goes back to the drop, too. I would say that you can get away with the factory shocks and struts in this case, due to the relatively drop, the more forgiving progressive spring rate, and also the low mileage of the components. If your shocks and struts had a ton of miles on them, I would replace them. But in this case, since we're talking about relatively new cars here, I don't think it's necessary. When it comes to price, these springs are going to be one of the middle of the road options. They're not the most expensive, but they're not the least expensive, either. They cost just under $250, which is the same price as the Sportline springs. If you're just looking to get your car lower, and you're not concerned with ride quality, there are some on the site that cost a little less, and will get you where you need to be. On the other hand, if you are concerned with keeping a nicer ride quality, then you're shopping in the right place. So the install here is going to take about four hours, and I'm going to call it a two out of three wrenches on the scale. You will need some knowledge to complete the install, so I would recommend having a knowledgeable helping hand, or taking this to a shop for the install, especially since it's always a good idea to get an alignment after the install anyway. 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. Going to need a few tools, including a spring compressor, so make sure you have that before you start the install. Going to 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 spring from the strut and install the new front springs, which are compressed and installed the same way. The strut assemblies go back in the same way they came out, and the install is the same for both sides. The rear is where things are a little different, but nothing crazy here. Essentially, the IRS subframe will be dropped, along with the rear shock mount, so you can slide the rear spring out. Just like the front, the rear springs install the same way they're uninstalled, and no surprises here. The new bump stops slide onto the shock, followed by the factory dust boot. The new springs can be installed, and the IRS subframe can be bolted back up, and that's about all it's going to take. Like I mentioned earlier, a fresh alignment after the install isn't a bad idea. Wrapping things up here, the Eibach Pro-Kit lowering springs offer a balance between a spring that will leave the car sitting about an inch lower, and with a comfortable ride quality. The springs give what I'd consider an aggressive look to the S550 that is balanced, and will work to improve handling as well. The springs are not difficult to install, they're in the middle of the pack as far as pricing goes, and you can check them out more online right here at AmericanMuscle.com.

Improves Handling. These Eibach Pro-Kit Progressive Rate Springs will lower your S550 GT Mustang's center of gravity, reducing squat during acceleration, body roll in the corners and excessive nose-dive under hard braking. A set of Eibach Pro-Kit Lowering Springs are great for daily driving, street and even track use.

Improves Appearance. Not only does a set of Eibach Pro-Kit Springs improve the handling of your S550 GT, but it also improves it's over all appearance by lowering the ride height to get rid of that lifted 4x4 look that they roll out of the factory with for a more aggressive stance.

Progressive Design. Eibach's proprietary progressive spring design provides the ultimate balance to deliver aggressive good looks and high performance handling, without ever compromising safety or ride quality.

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 Eibach Pro-Kit Springs are designed to fit both coupe and convertible 2015-2017 GT Mustangs.

Estimated Coupe Drop: Front - 1.1" Rear - 1.0"

Estimated Convertible Drop: Front - 1.2" Rear - 1.1"
Front Alignment: Rear Alignment:
OE Camber = -0.8 deg (+/-0.8 deg)
OE Caster = 7.2 deg (+/-0.8 deg)
OE Toe = 0.0 deg (+/-0.2 deg)
PRO-KIT Camber = -1.0 deg
PRO-KIT Caster = 7.5 deg
PRO-KIT Toe = 0.2 deg
OE Camber = -1.2 (+/-0.8 deg)
OE Toe = 0.1 deg. (+/-0.2 deg)
PRO-KIT Camber = -1.4 deg
PRO-KIT Toe = 0.2 deg

Fitment: 2015 2016 2017 Details

What's in the Box
  • (2) Front Lowering Springs
  • (2) Rear Lowering Springs
Installation Info
Tech Specs
Springs Specifications
Spring Rate: Front: 200-314 lb/in.
Rear: 800-914 lb/in.
Usage: Street
Year: 2015-2017 GT Model: Coupe
Convertible
Progressive or Standard: Progressive Estimated Drop:

1.1"F / 1.0" R
1.2"F / 1.1" R

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

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Most Helpful Reviews

5/5
Eibach Pri-kit

Great product,better ride, car handles better and looks great.

Helpful (2)

5/5
Love it

Love this lowering Springs. My car looks super aggressive compared to stock. Definitely recommend it for anyone looking to lower there car and still have a comfortable ride.

Helpful (2)

Overall Rating 4.9 out of 5 stars
Read All 51 Reviews

Customer Photos (53) Submit Your Photo

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14 Questions / 4 Answers

Ask a Question

will the Eibach pro-kit lowering springs work with my 1" wheel spacers on the 255/40r19 wheels? Thank you

Jim

  • The Eibach Pro-Kit springs will work with the 1" wheel spacers ona 255/40R19 as we can confirm fitment of those tires up to a 2" drop.

    KevinD92

Helpful (1)

Will these springs lower a Performance package GT the same they would a normal GT?

mike

  • The Eibach Pro-Kit Lowering Springs (15-17 GT) will lower a GT with the Performance Package. The Performance Pack gives the car around a .5" drop while these springs give the car 1.1" drop in the front and a 1.0" drop in the rear. So, you will be seeing a .5" drop since you are already slightly lower than stock.

    AshleyK

Helpful (1)

Hello, I just got these installed today on my 16 premium GT. The mechanic said I still need some cast cambers. He's unable to get the alignment correct. Plus it is makes a screeching sound. Do you know what the problem may be?

Michael

I have a 2015 GT with the Performance Pack with 305/35/20 tires on 10x20 super snake wheels on the rear, 255/35/20's up front on 9x20's. Will I have any tire rub issues in the rear with this lowering kit ? And how will the car handle and drive compared to the P.P. suspension the car came with ? Thanks, Steve

steve

Hello, will this cause issues with the independent rear suspension?

Michael

  • No, The Eibach Pro-Kit Lowering Springs for the 15-17 GT Mustang will be specifically designed to work with the IRS and S550 chassis. You will not have any issues using these springs with the IRS rear.

    AMCoal

Helpful (0)

I have the American Muscle PP style rims 275/35/20 in the front and 315/35/20 in the back will these springs work for tires that size?

BobtheBuilder

  • With your tire selection that is in the range around 27.6 inches tall in the front and 28.7 inches tall in the rear you may run into some rubbing issues with the Eibach Pro-Kit Lowering Springs (15-17 GT).

    Pat K

Helpful (0)

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Customer Reviews (51) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Handling Improvement 4.615385 4.6
  • Ride Quality 4.615385 4.6
  • Appearance 4.923077 4.9
  • Bang For Your Buck 4.846154 4.8



  • 5/5

    Installation Time: Afternoon

    January 23, 2017

    Eibach Pri-kit

    Great product,better ride, car handles better and looks great.

    Ricardo

    Year: 2017 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    November 15, 2016

    Love it

    Love this lowering Springs. My car looks super aggressive compared to stock. Definitely recommend it for anyone looking to lower there car and still have a comfortable ride.

    Dilverl53

    Year: 2016 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    October 09, 2015

    Looks great

    Really got the car down and fills the gap. Looks great with my 20" wheels. Can't really tell a difference in ride quality.

    Gasman

    Year: 2015 Submodel: GT Arlington, TX

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    August 27, 2015

    Looks so much better

    The stock springs on a 2015 Mustang GT are fine but there was an awkward gap in the wheel wells. I could not be more please! I'm so glad I didn't go for the lower springs because I'd probably not be able to get in and out of my driveway these are perfect!

    Oakley

    Year: 2015 Submodel: GT

    Helpful (2)

  • 1/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    May 14, 2015

    **BEWARE**Look good but be prepared for progressively worse creaking and springing noises

    I bought these springs about a month ago for my 2015 Mustang GT. At first all seemed great they made the car looks great. Then they slowly started making creaking sounds from the rear, then the front, then springing sounds started (all of this while moving slowly). Then it got worse and now every time I turn the wheel while moving I hear a bumping/creaking and a springing sound. I had these installed by a professional tech, I also had Ford look at this when I started getting the sound and they said the install looks perfect, they greased all the bushings but that did nothing. Now between buying the springs, getting them installed, getting an alignment and having it looked at for this issue… I have spent almost $800 and my brand new 2015 Mustang sounds like it’s 40 years old when I turn the wheel or even hit the slightest bump at 2-5mph. I called Eibach, opened a case with them. They are now claiming “it’s probably just the bump stops” and they “don’t warranty noises caused by their springs”. DO NOT BUY!! Unless you want your new Mustang to sound like an old creaking and springing beat up Pontiac Grand Am. Your call.

    Unknown923

    Year: 2015 Submodel: GT Buffalo, NY

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    August 11, 2017

    Really like!

    My '17 mustang GT with PP now looks much better and performs better. No issue with 25mm spacers on both front 255 and rear 275 tires. Riding quality is not any firmer than before just better cornering feeling and performance. Couldn't be happier.

    terry

    Year: 2017 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    April 01, 2017

    Makes a big difference in handling

    Had my local speed shop install these on my 2017 gt performance pack. Had car aligned. First impression was that the car looked slightly lower than stock. After driving the car the improvement in ride and handling were obvious. The car corners much flatter. The ride is less harsh and bouncy. Much more fun and confidence inspiring around curves. Much less body lean. I highly recommend these. No problem with speed bumps.

    JeffreyS

    Year: 2017 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    March 24, 2017

    Just right

    Good for daily driving, better than stock (non p.p.) springs. Took about 4 hrs w jack and stands

    ChristianK

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    November 03, 2016

    The car looks KILLER!

    I had Performance Automotive install the springs so really can't give any install info.Took them 3 hours to put the springs in and then checked the alignment....PERFECT. Handling is incredible and looks KILLER! Can still make it over the speed bumps. WOOOA HORSEY

    Kimber45

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 29, 2016

    Stance

    Took 3 hours in the driveway with a jack stands. Didn't have to take the rotors off. Install went easier than I thought it would. The pro kit worked perfect with my 1" spacers on 20" wheels. Definitely stiffened up the body roll but doesn't feel any harsher on the highway.

    JoeQ

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    October 12, 2016

    Eibach pro kit

    The springs are excellent. I think it actually improved the ride quality of my 2015 Mustang GT. A lot of the bounciness that was in the car is taken away in the car rides so much better

    Gt40fiveo

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    October 05, 2016

    Great look!

    Put on my 2016 GT..gave the perfect stance I was looking for and tightened up the ride as well. Completely satisfied!

    NCsleeper50

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    August 23, 2016

    Worth every penny upgrade

    With the right tools on-hand, it was quite an easy installation. I have a GT PP. The fronts took about 2 hours and the rears 1 hr. The car lowered about 1 inch both front and back. The ride feels almost as PP stock with must less dive and bounce. Cornering is much tighter. Quite an improvement on looks and performance.

    jolen1aub

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    August 15, 2016

    Totally worth it

    Just installed these during the weekend, looks better drives better worth the 5 stars pefect drop

    Dongela

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    July 13, 2016

    That stance.

    Was an easy install didn't run into any problems. Eibach is a great product highly recommend getting these if you want lowered look without it being too low. handles so much better to

    Noodleman

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 11, 2016

    Great New Stance

    These springs really make my 2015 convertible look great. Amazing how just an inch makes a huge difference. Just a side note, much more time consuming to put them on a convertible rather than a fastback due to the extra strengthening that Ford adds to the underside

    Dabittner

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 10, 2016

    Excellent modification,

    The Eibach Pro-Kit Lowering Springs are excellent. I immediately noticed tighter responsiveness. Accelerating within curves were as snug a going straight. I will remind anyone who buys these, you will need a Camber Set for the alignment that must be done after installation. Now my ride sits tightly to the road.

    Sy

    Year: 2016 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    October 23, 2015

    Eibach Lowering Springs

    Nice bang for your buck. Luckily I have a friend that works at a car shop so using a lift cut down install time in 1/4 the time. Alignment wasn't too far off right after install but going to drive it around for a couple hundred miles and realign. Definitely can feel handling around corners is a lot better. Ride is a little stiffer but definitely still good for a daily driver.

    MustangGuy2015

    Year: 2015 Submodel: GT Las Vegas

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    September 24, 2015

    Eibach Pro-Kit

    You can feel the progressive rate spring design while your driving. Rides nice and smooth. Then stiffens up in the corners. The ride is a little harsh on wavy dips in the road but there isn't very many of those around.

    EvilTwinGT

    Year: 2015 Submodel: GT Leander, TX

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    August 12, 2015

    Great Product

    Perfect amount of drop for great looking daily driver! Ride is almost unchanged but far more stable in the corners, No sound issues and the car feels so much better on the road...

    2015MustangGT

    Year: 2015 Submodel: GT Washington

    Helpful (1)

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