(approx) 4 Hours
Mechanical expertise or professional installation required.
- Customer Submitted:
- How to Install Lowering Springs on your 1999-2004 Mustang GT
The Eibach Sportline lowering springs are going to be a good option for the owners out there who are looking for a progressive-rate spring that'll give an aggressive drop and aggressive handling. The spring is perfect for those owners out there that are willing to sacrifice some of the nicer amenities of a soft ride quality in order to gain one of the biggest drops from a lowering spring. These springs will lower the car 1.7 inches in the front and 1.5 in the rear. As far as the install goes, you're looking at a two out of three wrenches on the difficulty meter and you can plan on spending a half a day to get the install done. The Sportline springs are a very popular aftermarket spring. Not just for these cars, but across multiple generations, because of the amount of drop that they offer. Right now, this kit is going to be your go-to choice if you're looking to drop the car as low as possible on a lowering spring. Even though these offer a lot of drop, the Sportlines feature a progressive or dual-rate spring, which is always a great choice for a streetcar. Because it'll be relatively comfortable in cruising, but progressively get firmer when you start pushing the car and that's reflected in the spring rates. Some of the benefits of using a progressive-rate spring like this include improved roll control over a traditional linear spring, especially when paired with a set of matched sway bars, like the Eibach sway bars. Ride quality is something that's going to be subjective. But I can at least give you an idea of what to expect here. Taking into consideration the fact that these offer a good amount of drop and that they are progressive, you can definitely expect a firmer ride quality. You are going to notice more bumps in the road and have more of what I call a "sporty" ride quality. But it isn't a bad ride quality at all. Another thing that I wanted to bring up here is caster camber plates. Caster camber plates are always going to be a good idea when you lower your car. But they don't really become necessary until you hit one and a half inches or lower. In this case, I'd say that a set of CC plates are needed if you don't already have a set, since these offer a big drop. That way, you know that you'll be able to get your car limit back in spec after the install. Speaking of extra things here, it's also always a good idea to pick up some new spring isolators, especially if they have a lot of miles on them. These springs are still going to allow the car to clear the stock wheels and tires. But they'll also clear the preconfigured wheel and tire combo kits that we offer here on the site for the specific generations, so you won't have to worry about rubbing. I do want to specify that these will fit the '79 to '04 V8 coupes and the '99 to '04 V6 convertible Mustangs. They will not fit the '99 to '04 Cobras due to the IRS. When it comes to price, you can expect to pay just north of the $250 mark for these springs. If this price sounds a bit high for you, you can always shop around for another brand and save a little bit of money. SR Performance is very budget-friendly, and Vogtland, ST Suspension, and Ford Performance all have similar offerings for a touch less than these springs. As far as the install goes, this isn't a difficult install, but it does involve a lot of work. I'm going to call this one a two out of three wrenches on the difficulty meter. You're looking at spending a half a day in the garage, and you'll need an assortment of wrenches and sockets, and of course a spring compressor, and a jack and jack stands if you don't have access to a lift. This is all straightforward and it's something that most people can handle themselves. You're going to have to break down everything like your calipers and rotors, and get your old shock and strut, and spring setup out. Luckily, since this kit is a direct replacement, it makes the install easier. Your springs and struts install separately. So you're looking at needing to slide the front struts into place and getting the top nuts back on, as well as getting the spring seated and in place. The rear is a little bit different, but you're still looking at needing to remove your factory component. After the springs are installed, the shocks can be installed and those go in the same way the factory ones came out, and that's pretty much it. Keep in mind that after tweaking this much of your car's suspension, you're going to need an alignment to make sure everything still looks good and is in spec. That's going to do it for my review of the Eibach Sportline spring kit for the '79 to '04 V8 coupe and the '99 to '04 V6 convertible. But you can check these out more online right here, at americanmuscle.com.
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March 28, 2020
Great upgrade. Much more comfortable ride and much better look. Rubber pieces do not come with this, so make sure you buy them seperately!Helpful (0)
February 02, 2020
Love my lowering springs!
So I stuck with my stock Struts and shocks. The springs are amazing. They are actually a lot better than the OEM springs! They ride so much better and going over bumps is also better. Good bang for my buck!!!Helpful (0)
December 31, 2019
Eibach Sportline Springs
I installed the sportline lowering springs on my daughter's 2003 mustang gt coupe. Car looks amazing, handles great overall i would highly recommend these to anyone who wants to get rid of the 4x4 look these cars have from the factory. I also bought the camber bolts which were needed to get camber back within specs. CC plates were not needed on this installation as lots of people say they are a must.Helpful (0)
November 26, 2019
Gives your car a nice stance and couldnt ask for more.Helpful (0)
August 20, 2019
Bang for your buck
Its the perfect rude height and it's not too bad to install. And gives the car a very aggressive stance. Absolutely love it!Helpful (1)
July 23, 2019
Just installed these springs and koni shocks with the steeda bumpsteer. What a night and day difference! So worth it and should have done long ago. Wish the springs lowered it more but feels greatHelpful (1)
May 15, 2019
Great ride quality and awesome stance ! Easy to install but do high quality shocks and struts along with them.Helpful (1)
May 08, 2019
I purchased the eibach lowering. Springs and I am really happy with the height drop of these springs it’s perfect with my 17’ cobra r rimsHelpful (2)
April 19, 2019
Eibach Sportline Lowering Springs.
Installed these on my 2001 GT combined with new damping adjustable shocks and struts (KYB AGX) Steeda bumpsteer kit and the ride quality and looks are great ! Compared to stock , the car corners way better and goes over bumps much smoother. Used the SR Performance Polyurethane Spring Isolators kit for the rear (top and bottom) , and only used the top isolators in the front (didn't use the bottom ones). Got about a 2" drop all around. Took about 4-5 hours to install (front and rear springs bumpsteer kit).Helpful (3)
April 09, 2019
Awesome quality !
Eibach is quality springs the best alternative to coil overs cause lowering springs are the cheap option but if you don't got $2000 to blow I highly highly suggest these springs. Quick note if you have an x pipe be careful your clamps will scrap going into certain driveways if they're steepHelpful (1)
Will these fit the 99 v6 coupe? If so will it actually lower it? Thanks AM
Although advertised and designed for the 99 V6 convertible, it will certainly fit the coup as well. The convertibles are heavier than the coups, so the springs will be more stiff than intended, and the Mustang won't drop as much as advertised, due to its lighter weight in comparison.
what is the spring rates on these sprinsg?
Front is 550 lb/in. and rear is 251 lb/in.
I am planning on putting 20" Rovos on my 2002 GT. Will these springs be too low?
The Eibach Sportline Spring Kit will fit 20 inch wheels. However fitment will depend on the tire size you add as well.
I have a 1996 convertible GT and was wondering if these would fit.
The Eibach Sportline Spring Kit would work with the convertible models, however, is not set up for the weight difference from the convertible to the coupe models and will react differently.
I have a 2000 gt 275 in front 315 in rear will these work thank u
The Eibach Sportline Spring Kit will work with those tire sizes as long as the wheel offset is correct. All of our Mustang wheels will allow this to work, as well as any aftermarket wheels sharing the same offset for that given size.
These springs will only need caster camber plates, and a panhard bar, and that's only if you need them. Ultimately, every Mustang reacts differently to being lowered, so some will need caster camber plates, some will need a panhard bar, some will need both, and some may not need any. We suggest to get an alignment check regardless for this reason.
Yes, that will fit just fine. You can go as large as a 275 up front and a 305 in the rear when lowered up to two inches on a New Edge Mustang.
The stock shocks work just fine however any of our stock replacements, like the Koni's for example, will work just fine.
Yes, these can be used with SR Performance caster camber plates and sway bars.
This will only work on 79-04 V8 Coupe's(excluding Cobras from 99-04) and 99-04 V6 Convertibles. This will not fit a 96 GT Convertible.
This will not fit V6 coupe models.
They will not fit your vehicle.
(approx) 4 Hours
Mechanical expertise or professional installation required.
What's in the Box
|Spring Rate:||Front: 550 lb/in. |
Rear: 251 lb/in.
|Year:||1979-2004||Model:|| 79-93 V8 Hardtop, |
94-04 V8 Hardtop
99-04 V6 Convertible
|Progressive or Standard:||Progressive||Estimated Drop:|| |
1.7"F / 1.5" R