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Eibach Sportline Lowering Spring Kit (15-18 GT w/o MagneRide)

Market Price $294.30 You Save 10% ($29.43)
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  • Item 384461
  • MPN# 4.14535

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    Features, Videos & Details

    • Extreme Lowering & Aggressive Stance
    • Race Car Like Handling
    • Lower Center of Gravity
    • Progressive Spring Rate
    • Coupe Drop: Front - 1.5” Rear - 1.3”
    • Convertible Drop: Front - 1.6” Rear - 1.4”
    • Clears Stock and Aftermarket Wheels & Tires
    • Not Compatible on MagneRide Equipped Vehicles
    • Fits 2015-2018 Coupe and Convertible Mustangs

    Review & Installation Video

    Hey, guys. Stephanie with AmericanMuscle.com here with the Eibach Sportline Lowering Springs for 2015 and up S550 GT Mustangs. The Eibach Sportline Lowering Springs are going to be a good option for the S550 GT owners out there who are looking for a spring that will give an aggressive drop and more aggressive handling. The spring is perfect for those S550 GT owners out there that are willing to sacrifice some of the nicer amenities of a softer ride quality in order to gain one of the biggest drops for the S550 from a lowering spring. Lowering springs have a big impact on the S550s. They can completely change the looks of the car without having to change a lot, and the Sportlines offer one of the largest drops for these cars. The Sportline springs are going to drop the GT about one and a half inches in the front and 1.3 inches in the rear. And like I said, it doesn't get much lower than this for the S550 from a spring, and this is an aggressive drop. The drop will change slightly depending on if the car is a coupe or convertible due to the weight differences between the models. But depending on your wheel and tire setup this drop is going to eliminate nearly all of the wheel gap that the GT has from the factory, and it's going to leave the car nearly tucking tire but sitting just above depending on what size wheels you have. Now a one-inch drop is pretty standard across the board for the S550 and I would say that one inch lower is pretty significant for these cars, and I mean significant in both looks and performance changes. So that means the one and a half inch drop that the Sportlines offer is the max drop from a spring that you're going to be able to find. This drop will lower the car's center of gravity enough to create more track like handling capabilities. These springs are really going to reduce squat during acceleration and reduce wheel hop as well. You're also looking at much less body roll during cornering and less nose dive during braking. Lowering the center of gravity this much on the S550 means that these springs are really going to change and tighten up the handling of these cars. Now, if you think one and a half inches is too much of a drop or you really wanna hang on to some of those softer ride quality characteristics, Eibach also makes a pro kit lowering spring. They drop the car about one inch all the way around and they will ride differently than the Sportline kit a little bit more comfortably. To really lay this out, I would say that the Sportline springs are more aggressive and better suited for some track use, or for those that are really looking for high performance and forceful looks. They're an all the way around more aggressive spring. The pro kit springs on the other hand are a great option for those that would like to lower the car and reduce wheel gap but that wanna keep a ride quality and street ability in the forefront of their mind as well. This doesn't mean that the Sportline kit won't work on a daily driven car. It'll work just fine. It really all comes down to your personal preference and what you want out of the springs. The Sportline springs, like the pro kit springs, are still a progressive spring. Progressive springs concentrate on providing balance at all times in order to improve handling. I will say though that since the drop here is more aggressive than most other springs, and keeping the spring rate in mind, that these springs are not the most ideal for drag racing. There are some better options available on the site for you guys that wanna hit the drag strip. Those other options will allow for more weight transfer and give you better results on the drag strip. Now, these springs do provide an aggressive drop but they are still going to work with both the factory wheels and the pre-configured wheel and tire kits that are on the site. These springs aren't going to make the car difficult to drive places but you will need to be a little bit more careful. They're going to be stiffer than the factory springs as well, so you will notice some more road noise and bumps. But I won't say that these give a bad ride quality at all. They're just not as soft as factory. I do wanna 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 necessarily required, but I will say that the one and a half inch drop is about the limit of where you would need a set of adjustable caster camber plates in order to get the alignment within spec. It's going to be close, so a set of caster camber plates wouldn't be a bad idea at all. At the end of the day, it never hurts to have caster camber plates. So if you've got the extra cash, I'd say go ahead. But in all reality, you will be able to get away without picking up a set. 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 minor drop in the grand scheme of lowering cars, the more forgiving progressive spring rate, and also the low mileage of the components. If your shocks and struts have 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 in the middle of the road as far as options go. 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 pro kit springs. If you're just looking to get your car lowered or you're concerned with ride quality, there are some other options on the site that cost a little less and will get you where you wanna be. On the other hand, if you are concerned with keeping a nicer ride quality and getting as low as possible, 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 this install, so I'd 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 to a few tools, including a spring compressor, so make sure you have that before you start the install. You are 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 the same way they came out and the install is the same for both sides. The rear is where things are a little bit different but nothing crazy here. Essentially the IRS 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 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 Sportline Lowering Springs offer a spring with an aggressive drop and improvements in handling to make for a car that feels track ready. They will drop the car about one and a half inches all the way around and will leave the car sitting just above the wheels and tires. 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.

    Better Handling. Give your 2015-2018 S550 GT the sports car type handling it deserves with an Eibach Sportline Spring Kit. This lowering spring kit lowers your Mustang's ride and center of gravity even more than the legendary Eibach Pro-Kit, for maximum improvement in acceleration, cornering, and braking performance. A set of Eibach Sportline springs are the no-compromise choice for the enthusiast that still needs a streetable car.

    Maximum Lowering. Eibach's Sportline Spring Kits are designed to deliver the lowest possible drop for a race car like look and handling, while still maintaining exceptional ride quality.

    Progressive Design. Eibach uses their proprietary progressive spring design to create the Sportline springs. The result is a spring that delivers the maximum lowering and aggressive stance a true enthusiast demands, without compromising safety or ride quality.

    Clears Stock and Aftermarket Wheels & Tires. These lowering springs were engineered to be compatible with your factory 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. These Eibach Sportline Lowering Springs are designed to fit both coupe and convertible 2015-2018 GT Mustangs. Sold as a set of four.

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

    Estimated Coupe Drop: Front - 1.5” Rear - 1.3”

    Estimated Convertible Drop: Front - 1.6” Rear - 1.4”

    Fitment: 2015 2016 2017 2018 Details

    What's in the Box
    • (2) Front Lowering Springs
    • (2) Rear Lowering Springs
    Installation Info
    Tech Specs
    Springs Specifications
    Spring Rate: Front: 217-331 lb/in.
    Rear: 879-994 lb/in.
    Usage: Street/Track
    Year: 2015-2017 GT Model: Coupe
    Convertible
    Progressive or Standard: Progressive Estimated Drop:

    1.5"F / 1.3" R
    1.6" F / 1.4" R

    Will it fit my Mustang?

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    69 Questions / 65 Answers

    Ask a Question

    In the video on these springs are there spacers on the wheels? From the angles in the video it looks like the wheels sit very nice and almost flush with the fender. Would it be a bad idea to pair these springs with a spacer? I know someone asked about 1" already, but maybe something smaller? Would there be any rubbing or turning issues for stock GT/CS wheels? (Especially considering I live in NY- pothole central).

    AnthonyH

    • The Eibach Sportline Lowering Spring Kit which we have installed in our video will not have spacers on the wheels. These wheels will be a staggered aftermarket wheel which allow for the wheels to sit flush. Adding spacers to the rear wheels will absolutely provide this look to your stock wheels.

      AMCoalSVT

    Helpful (1)

    Do the front tires rub while turning

    SamC

    • The Eibach Sportline Lowering Spring Kit will not cause any rubbing with the tires as long as the tire isn't over a 285 in width.

      AshleyK

    Helpful (1)

    I looked on EIBACH'S website and put in my model of car a 2017 s550 V6 coupe and these came up. Is that just something they have and you guys only have ones for the V8 or do these fit both. Im just really confused and i really want that 1.5 drop in the front.

    JosiahB

    • The Eibach Sportline Lowering Spring Kit will physically fit the V6, however lowering amounts will be less, due to the lower weight of the V6 model, especially in the front.

      Rob D

    Helpful (1)

    I noticed that some people put these on their v6/ecoboost in the pictures. Will these work on my ecoboost?

    Devin530

    • The Ecoboost is lighter than the GT, so the estimated drop listed will be off but a couple tenths of an inch or so.

      JeffAM

    Helpful (1)

    What's the widest tire setup i can have on the rear with these with a 20" rim?

    Bsingh897

    I have a 2017 gt mustang with stagger wheels size 22 will this rub on the wheels

    MichaelQ

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    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Handling Improvement 4.696751 4.7
    • Ride Quality 4.563177 4.6
    • Appearance 4.963899 5.0
    • Bang For Your Buck 4.870036 4.9



    • 5/5

      Installation Time: Afternoon

      July 14, 2018

      Ahh yeah

      It’s like a whole new car... in a good way! The ride might even be better! 2 hours on a friends lift with his help.

      TomW

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      July 10, 2018

      Stance

      Adds a much better stance over stock springs. Definately need to get an alignment and needed camber adjustment bolts for front to get in spec.

      DustinO

      Year: 2015 Submodel: GT

      Helpful (0)

    • 5/5

      July 03, 2018

      Everything I Hope it Would Be

      Just got my 2015 Mustang GT Premium Convertible back from the shop where they installed the Eibach Sportline Lowering Spring Kit, Eibach sway bars, Steeda Bumpsteer Kit, and BMR Front Camber Adjustment Bolts. No more squatting on acceleration, nosedive on braking, or body roll. The 1.5" drop looks beautiful with my stock 19" wheels (255 40's). All parts came from American Muscle with zero issues. I had a local garage do the install and alignment. Getting the old rear springs out was apparently quite a challenge. It took a full day to install everything, but the results are amazing. The car looks great and gets compliments and long looks more than ever. I highly recommend this combination of parts.

      JimB

      Year: 2015 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      June 30, 2018

      Sportline

      Great item for the price. Really love the new stance of my S550. I would recommend. Took me about 2.5 hours on a lift by myself.

      DwayneS

      Year: 2016 Submodel: GT

      Helpful (0)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 28, 2018

      Nice

      Really lowers the car no more ugly gap. Worth it if you wanna “slam” it.

      DonovanP

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Full Day

      June 28, 2018

      Love the stance

      The eibach sportlines were a great addition to my 2017 GT. I absolutely love the way it looks now, but I will be purchasing some larger wheels in the very near future. The springs include very little instruction and YouTube is a huge help, but beware that many of those videos show an install with zero issues. I had a few bumps along the way, but I did the job myself with a jack and jack stands.

      CDOG1977

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      June 15, 2018

      AMAZING

      Love it, perfect fit. best mod i have done to my car so far. also the ride quality is not as bad as i thought

      DucN

      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      June 14, 2018

      Springs

      Great ride as well as the car sits at a great level making it look even meaner

      MarkW

      Year: 2018 Submodel: GT

      Helpful (0)

    • 5/5

      June 12, 2018

      Very impressed.

      Got exactly what I was looking. An aggressive stance and still have a great ride.

      SantiagoV

      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Full Day

      June 11, 2018

      nice drop

      very nice drop, no rub at all. spent 6 hours on jacks.... but all is worth

      edano

      Year: 2018 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      June 09, 2018

      Little bump first...

      Upon install, I had a crazy creaking sound coming from the front. Redid the install on the fronts and still had it. Eibach and American Muscle were great with it, and sent me out a replacement set that is PERFECT. Overall, this doesn't throw off alignment much, the look is PERFECT, and the ride quality is hardly different from what I can tell compared to the performance pack springs normally are.

      Jeff

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      June 05, 2018

      Eibach Sportline Lowering Spring Kit

      I am Very Happy with my purchase and it achieved the look I was wanting.

      Dib

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      June 04, 2018

      Beast

      These spring are perfect if your looking to drop your car! When you finish installing these and put it back on the ground..if you don’t love your car yet...you will then! Makes the ride look mean like it’s suppose to!

      StephenK

      Year: 2015 Submodel: GT

      Helpful (2)

    • 3/5

      Installation Time: Afternoon

      June 03, 2018

      Look good but have had alot of problems.

      First of all the look amazing make the car look great but i have had tons of creeking and popping so much so that im always checking the bolts and everything else and a week after I installed them my wheel bearing went bad and because I installed them ford wont pay for the new one.

      JakeT

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 31, 2018

      Best ride height

      Great product and easy install with the right equipment! Makes the S550 sit how it should ! Perfect figment ! Virtually eliminates all wheel gap.

      Jesse

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 26, 2018

      Great fitment, looks and feels good.

      These were installed on my 2015 gt track pack. These look and feel amazing! We did the install with the use of jack stands opposed to a lift and it worked out sell. The rears are fairly easy and the fronts are easy enough IF you have a good spring compressor (not the ones you can rent from auto zone). It took 2 people that are pretty proficient with auto work about 3 hrs to get it all done. The handling feels more responsive and planted. Just have to be careful not to park too close to curbs. Overall I would but these again but I would buy new struts with them. The ride quality is a bit stiffer but still very manageable. Drove about 1000 miles a week after install and the bumps did not bother me much at all. 10/10 would buy again.

      JosephS

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 26, 2018

      Great springs!

      Well worth the money. They got rid of 3 things I hated about my mustang. They got rid of that ridiculous wheel gap, gave it a more aggressive lower stance and got rid of the nose lift between shifts. Also, the car doesn't scrape on everything.

      Patrick

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 25, 2018

      Should have done it the day I bought car!

      Love the drop. Got rid of wheel gap. Took me w while because I bought cheap spring compressor, but other than than it all went very well. Love them

      AndyT

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 22, 2018

      Awesome look

      Awesome fit. Definitely have that aggressive lowered look. Won’t buy any other springs. Eibach all the way.

      LatyjaB

      Year: 2018 Submodel: GT

      Helpful (0)

    • 2/5

      Installation Time: Shop Install

      Installation Cost: $250-$500

      May 22, 2018

      Looks great, sounds bad...

      I had a reputable local shop handle the install. Everything went smoothly and installed with no issues. After driving, I noticed a substantial noise from the front driver's side while at parking lot speeds going over bumps. Some noise when turning the wheel as well. Took back to the shop and they found nothing wrong. Just to be sure they disassembled the strut and then reassembled. Noise is still there, seems to be getting worse and now on both sides. Have no idea what's going on. The car only has 16,000 miles on it. I had zero noises before the install. Sway bar, all connections and bushings are good.

      DustinR

      Year: 2017 Submodel: GT

      Helpful (9)

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