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Ford Performance Lowering B-Springs (79-04 All, Excluding 99-04 Cobra)

Market Price $234.59 You Save 13% ($30.62)
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  • Item 50151
  • MPN# M-5300-B

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Features, Video & Details

  • Aggressive Stance
  • Lowers Center of Gravity
  • Improves Handling
  • Progressive Spring Rate
  • 1979-1993 Estimated Drop: Front 7/8"; Rear 1/2"
  • 1994-2004 Estimated Drop: Front 1-1/8"; Rear 3/4"
  • Fits 1979 to 2004 Mustangs, Excludes IRS
  • Clears Stock and Aftermarket Wheels & Tires.

Review & Installation Video

Review & Install Video

Hey, guys. Adam here with Today, I'm bringing you a detailed overview and installation of the Ford Performance Lowering B-Springs, which are available for all '79 to '04 GT, V6, and Mach 1s, as well as the '93 to '98 Cobras of both the coupe and convertible. In this video, I'll be going over what you can expect, as far as the drop in ride height from the lowering spring from Ford Racing, as well as its performance and benefits to your suspension and handling. I'll top it off with the installation, which I'll let you know up front here, gets a two out of three wrenches on our difficulty meter. Not the hardest job in the world, but it does require a little know-how, a little patience, and maybe a helping hand if you have one on deck. The Ford Performance Lowering B-Springs, which I have here today, will be for any '79 to '04 Mustang owner, who's looking to lower the center of gravity on their pony in order to get a more aggressive ride stance. While also improving greatly their suspension and handling performance with a progressive spring rate, like these. Obviously, when adding a set of lowering springs to your Mustang, you're lowering the center of gravity which, of course, will then, in turn, improve your suspension and handling performance, while also giving you an aggressive stance, depending on how low you go with the drop. So the first thing I wanna talk about right off the bat is, of course, how low are you gonna go when adding the B-springs from Ford Performance to your Mustang. Now, with the Fox Body '79 to '93 Mustangs, you can expect a 7/8 of an inch drop in the front and a 0.5-inch drop in the rear. Hearing those numbers, not too big of a drop overall. But lowering that center of gravity, even the slightest, will improve the handling performance of your Mustang. Now, as far as the SN95 and New Edge is concerned, all '94 to '04 Mustangs will drop 1-1/8-inch in the front, and of course, 3/4 of an inch in the rear. Again, not the biggest drops in the world, but a little bit bigger than the Fox Bodies. Either way, I want you to rest easy knowing that all of these drops for your Fox Body, SN95, or New Edge will clear, in fact, the stock wheels, as well as aftermarket wheel and tire kits you might have gotten from Now, in addition to the drop in right height, I wanna talk about the performance benefits you can expect. But I also wanna point out, Ford Performance offers a couple of different letter springs out there on the market, such as the B-springs we have here, but also C-springs and G-springs. Now, the differences in these springs might not be so obvious when you're checking it out yourself. So of course, I wanna point that out for you and explain the difference between the three, so we can help you make your decision a little easier. Now, the easiest one to point out is going to be the G-spring from Ford Performance, because it has a different ride height than the C and B-springs, which will be the exact same. The G-springs will drop your car a 0.5-inch in all 4 corners, whereas the C-springs and the B-springs we have here will drop it exactly what I said just a little bit ago in this video. Now, of course, the only difference between the C-springs and the B-springs is going to be the spring rate. If you're looking at these B-springs, you can expect a progressive spring rate. Now, progressive just basically refers to a normal spring rate, normal driving conditions, a pretty normal feel when you're driving it on the road, maybe a daily driver or commuting to work. And of course, it will get a little bit stiffer when taking those hard turns. It kind of adapts to those harder driving situations. That basically allows the spring to get a little bit more comfortable around those turns and adapt to that hard driving or cornering situation. Now, on the other hand, there is the C-spring that Ford Performance offers, which is going to have a standard spring rate. Standard just means it's basically linear and doesn't adapt to any different driving situation. So it allows the driver to more accurately predict how the springs will react in each certain situation. After all, it just comes down to what exactly you're using your Mustang for. Both of these springs are good for street driving and track driving, just one a little better than the other. Again, it comes down to your personal preference. The ride height will be the exact same between the two, but the spring rate is going to be very, very different. Now that we got that out of the way, I wanna talk about the pricing because it will differ, as well. Now, the B-springs we have here, with the progressive spring rate will come around the $200 mark. Now, if you're interested in a more linear standard spring rate, like the C-springs, that'll come in a little bit less at the $150 mark. If you'd like the G-springs to drop a 0.5-inch in all 4 corners, you're looking at about $220. Overall, just down to your personal preference, how much you wanna spend, what kind of spring rate you're looking for, and how low you want your Mustang to go. Now, the good thing about almost every single spring, from the Fox Body all the way up to the New Edge and '79 to '04 Mustangs, the installation for almost any spring in any brand is almost always gonna be the exact same. You're gonna wanna have a little bit of know-how on deck, or a helping hand if you're not too sure of the process. As far as the process goes, it's not the hardest job in the world. But it does require a little bit of patience and a little bit of caution. Now, as far as tools are concerned, if you are tackling it yourself, a ratchet and a simple socket set on deck, a jack and jack stands, or a lift if you have one, and a pry bar to help get those dusty springs off. If they're the factory options, they've been there a pretty long time, I'd imagine. Now, as far as timing goes, expect to have it done in about two hours, and it'll get a two out of three wrenches on our difficulty meter. To kick things off, we'll start at the rear of the Mustang, of course. You wanna jack it up by the rear end, remove one of the wheels, and then I'm gonna say you're gonna have to jack up the pumpkin or the differential housing right in the middle to relieve the tension on the shock bolts. From there, with the pumpkin up in the air, you wanna remove the bottom shock bolts from that shock tower, and of course, just lower that pumpkin down ever so slightly, or lower the differential housing until the spring tension is relieved. At that point, you can take the spring out using that pry bar, or just bring it out by hand if it's coming out pretty easily. At that point, swap it out with the B-springs, put everything back together in the reverse order, and you're good to go. Switching over to the front of the vehicle, you'll jack up the front end, of course, remove one of the wheels, support the vehicle under the lower control arm. You wanna jack that up to remove the tension, just like we did on the differential pumpkin on the back. Once that's jacked up, remove the sway bar end link, the bottom strut tower bolts, and then, of course, just lower that control arm down until the spring is removed. Once the spring is removed, pop in the B-springs, repeat the process in the reverse order, and you're good to go. Overall, about two hours' worth of time in the driveway at home, and a two out of three wrenches on our difficulty meter. Just to wrap things up, guys, if you're the owner of a 1979 all the way up to '04 Mustang, whether it's a coupe or convertible, you might be looking to lower the center of gravity on your Mustang to get a more aggressive stance and improve the handling performance. If you're looking for a progressive spring rate, you might wanna check out the Ford Performance B-Springs we have here, which are available at

Improves Handling. These Ford Racing "B" Springs will lower your Mustang approximately 1" giving it a more aggressive stance and a lower center of gravity greatly improving your pony's handling over the factory springs.

Aggressive Stance. Adding a set of lowering springs to your Mustang can greatly improve its appearance by getting rid of that "4x4" look that it came with from the factory for a more aggressive stance.

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. The Ford Racing B Springs fit all Mustangs from 1979 to 2004, except the 1999-2004 Cobra's with Independent Rear Suspension (IRS). Lowers 1979-1993 Mustangs approximately 7/8" front; 1/2" rear. Lowers 1994-2004 Mustangs approximately 1-1/8" front; 3/4" rear.

Technical Note. These springs will not fit 1999 to 2004 SVT Cobra's with Independent Rear Suspension (IRS) or GT Mustangs converted to IRS.

Spring Rates:

  • Front: 425/530 lb/in.
  • Rear: 200-300 lb/in.

Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (4) Lowering Springs
Installation Info
Tech Specs
Springs Specifications
Spring Rate: Front: 425/530 lb/in.
Rear: 200-300 lb/in.
Usage: Street
Year: 1979-2004 Model: All except IRS Cobra's
Progressive or Standard: Progressive Estimated Drop: 1979-1993: 7/8"F / 1/2" R
1994-2004: 1-1/8"F / 3/4" R
Will it fit my Mustang?
  • Bullitt - 01
  • Foxbody - 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93
  • Mach 1 - 03, 04
  • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
  • Cobra - 94, 95, 96, 97, 98
  • GT - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

People Who Bought This Item Also Bought

Most Helpful Reviews


I just installed these spring as a replacement for my cut stockers. The difference is day an night even over 100% stock springs. The ride is much better than factory, but feels more responsive. The drop ...

Read More
Helpful (15)

Springs that work!

When I purchased my 92 SSP foxbody about 2 months ago, it had Eibach lowering springs installed. Whoever installed those must have been going for the ultimate lowering as this was really too low! They ...

Read More
Helpful (12)

Overall Rating 4.8 out of 5 stars
Read All 63 Reviews

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19 Questions / 6 Answers

Ask a Question

will these springs be a good combo with the sr shocks and struts kit?


  • The Ford Performance Lowering B-Springs would work very well with the SR Shock and strut kit.

    Rob D

Helpful (1)

i have a v6 convertible with 16 inch wheels, will these springs work for my car since Im planning on lowering it but still keep good ride quality.


  • The Ford Performance Lowering B-Springs will work on a 94-04 Convertible V6 Mustang.


Helpful (0)

Will i need CC Plates with these springs?


  • Caster Camber plates are not required when lowering your Mustang however it will improve the handling and drivability once installed. When lowering the car you change the geometry of the vehicle and since the car will sit lower, adjusting the angle of the wheel/tire will improve the way the vehicle will drive especially when using for performance applications.


Helpful (0)

Hey AM team. I am after the Ford Lowering Springs. I'm from NZ so shipping them over is heaps, but I am in US in early April so can get them sent to my sister and I bring them back but need to know the weight what all 4 will be. My bag limit is 44 pounds. cheers.


  • Hello! The shipping weight of the Ford Performance Lowering B-Springs is 37.25 lbs.


Helpful (0)

Will the springs we took off of 2010 Mustang fit a 1998 Mustang


  • Unfortunately, the suspension between the years are very different. The springs are most likely not interchangeable.


Helpful (0)

What shocks and struts would you recommend with these springs?


  • I would recommend the KONI Sport adjustable shock and strut kit item #37814 to work with this kit as the adjustability of these shocks and struts will maximize your cars handling performance.


Helpful (0)

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Customer Reviews (63) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Handling Improvement 4.518518 4.5
  • Ride Quality 4.690909 4.7
  • Appearance 4.672727 4.7
  • Bang For Your Buck 4.745454 4.7

  • 5/5

    February 10, 2011


    I just installed these spring as a replacement for my cut stockers. The difference is day an night even over 100% stock springs. The ride is much better than factory, but feels more responsive. The drop could be lower, but I also install ISOs. I seriously recommend these to anyone wanting to strictly improve handling and ride quality.

    Mr. Red Pony

    Helpful (15)

  • 5/5

    Installation Time: Full Day

    October 27, 2011

    Springs that work!

    When I purchased my 92 SSP foxbody about 2 months ago, it had Eibach lowering springs installed. Whoever installed those must have been going for the ultimate lowering as this was really too low! They were installed without the insulators as well, so metal to metal noises were heard. I was bumping things that shouldn't be bumping, so I called AM for advice about the setup. I'm sorry I don't remember with whom I spoke with, but his advice was spot on! My compliments AM for having such knowledgeable & helpful sales agents! He recommended the "B" springs for my ride, which confirmed my thoughts about replacements as well. Ford made the cars, so it seems their replacement parts are the most likely to work the best. I was not disappointed. The rear took me, by myself, about 2 hours to replace, but the front took me & 2 other helpers about all day to do! Those are not the easiest things to get in, but not because of the brand, it's just there are tricks to installing front springs, so you don't kill someone when they fly out unexpectedly! That didn't happen, but one must be careful. We ended up compressing the new springs with an internal compressor then chaining the springs to keep them in that state, making them easier to install. The first side took us 5-6 hours, while the second only about 40 minutes. The springs are worth the trouble though, as ride & handling are superior with these springs. My ride height was restored to an acceptable height, and now things don't bump. I was able to give them a good workout this past weekend while attending one of our club's cruises. The car is low enough now to give it a more aggressive look without the problems experienced with the Eibachs. Any springs purchased, but I recommend these, should be installed with the poly insulators! Thanks AM for such great sales help & delivery.


    Year: 1992 Submodel: Other Winston Salem, NC

    Helpful (12)

  • 5/5

    June 21, 2011

    Nice springs

    Ride is much better. It is firmer, but not punishing at all (important on a convertible). Handling on curvy roads is now a blast. Springs have only been on a week. Car dropped about 1/2 an inch so far, but I'm sure some settling has yet to happen. Looking forward to more twisty driving. Haven't taken it on nasty city streets yet.


    Year: 2001 Submodel: GT

    Helpful (8)

  • 4/5

    August 28, 2011

    Awesome Springs

    I put these in as a replacement for my cut stock springs and the ride is so much better. They could lower it more, but i left my isolators in and hopefully they will settle more. Anyways install was a breeze...rear end took 15 minutes and the front two took an hour and fifteen minutes. Great springs...looks lowered and wont scrape!!!


    Year: 2000 Submodel: V6

    Helpful (7)

  • 5/5

    Installation Time: Full Day

    October 19, 2012

    From C to B

    I originally went from the stock spring to the C spring. These were way to stiff. After a little research I determined B was the way to go. These are a lot more road friendly. They greatly improved the ride quality over the C's. I do recommend these springs for a street driven mustang.


    Year: 1992 Submodel: GT

    Helpful (6)

  • 4/5

    February 10, 2013

    Ford Racing B Springs

    I decided to go with these springs to replace the stock that were cut. Althought the drop isn't dramatic, I can't complain on the improvement for handling. I have these springs in conjunction with the KYB GR-2 struts/shocks, the ride is pretty firm. Over all I'm satisfied with this set up and recommened to those wanting a step up in handling if on a budget.


    Year: 1998 Submodel: V6 San Diego,CA

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    July 02, 2012

    Ford racing B springs

    Ford racing B springs gave my stang the handling and ride it needed over the stock springs, a excellent choice, it took me 4.5 hours to install by myself. The car drop 11/8" in the front and 3/4 in the rear. Very Satisfied.


    Year: 1997 Submodel: GT Sumter, SC, USA

    Helpful (4)

  • 5/5

    July 28, 2011

    FRPP "B" Springs

    Used the "B" springs in conjunction with KYB Fox Body shocks/struts, MM Caster Camber Plates, MM Bumpsteer Kit, and X-2 Balljoints. Managed to lower the car 2"+ and ride comfort is excellent.


    Year: 1997 Submodel: V6

    Helpful (4)

  • 5/5

    Installation Time: Afternoon

    January 16, 2014

    No fitment issues with Ford springs on a Mustang

    Nice drop on my GT. No rubbing or bottoming out. I have a convertible that has to be female rider friendly, so these offered a nice drop with the stock spring rates. I have MAC LT headers and subframe connectors and again no issue with bottoming out. If you haven't looked at them lately, consider either replacing your lower control arms (like I did) or at least replace the lower ball joint and bushings while you have the car apart.


    Year: 2002 Submodel: GT Tampa, FL, USA

    Helpful (3)

  • 4/5

    Installation Time: Afternoon

    April 02, 2013

    Lowered to perfection

    I had bought the car it was lowered way to far, so i put stock cobra springs in it. but those springs where to strong and raised it up more then wanted. these new springs lowered it to the perfect stance and it handles a lot better and rides so much smoother.


    Year: 1998 Submodel: GT ohio

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    January 20, 2013

    Just right

    I thought about canceling my order after looking at the other 1.5 inch springs. I'm glad I went with these. With my 17 inch cobra wheels its a perfect stance. Doesn't look like a truck anymore, but doesn't scrape or look riced out. It looks awesome with the Mach 1 Chin spoiler too that I got on the same order. Highly recommend. It's pretty amazing what around 1 inch of drop will do.


    Year: 2000 Submodel: V6 Branson, MO, USA

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    October 17, 2016

    Ford Performance Lowering B-Springs -

    Awesome handling in corners. Relatively smooth ride on city roads, especially on highways. B-springs are the best choice after trying 2 other brand previously. It lowers the car just enough for greater looks. Highly recommend them!


    Year: 1990 Submodel: Other

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    May 16, 2016

    Great springs, perfect ride

    If you have a stock Mustang GT and when you go around a turn a little too fast, the whole car feels unstable, these springs will really help. Since they're progressive spring rates, they didn't make the ride any harder over small bumps, but when you go around a sharp corner, you immediately feel them stiffen up. The car feels much more planted and controllable, and it's a lot less scary to drive a little faster than I should. But if you can't go fast, why have a V8 Mustang. These took a long time for me to install because the factory springs were rusted into place, so I had to spend several hours with an air hammer, trying to get them out. They should only take about two hours, but give yourself all day just incase.


    Year: 2002 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    August 09, 2015

    Softer rider

    I had a different set of lowering springs that were to stiff for city streets. These brought back a comfortable ride while still lowering the car.


    Year: 1998 Submodel: V6

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    December 27, 2013

    FRPP B springs

    Installed these on my aunt's 03 GT along with KYB shocks and struts all around. She bought the car with H&R race springs and the factory shocks had blown over 60,000 miles, making the ride very bouncy and uncomfortable. These spring really softened up the ride and still have a sporty feel in the corners since they are a progressive rate spring. These springs are a great upgrade for the enthusiest looking to lower the car a little and make it an outstanding cruiser. As always thanks AM.


    Year: 2002 Submodel: GT Wilmington, NC

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 11, 2013

    Very good ride and handling

    I had my shop install these Ford "B" Lower Springs as well as Tokico shocks and struts on all four corners of my '03 'Vert GT. This setup needs a Caster/Camber plate installed for getting a correct alignment. The shop charged me $100 per corner for all of it, including installing the caster/camber plate, new spring Isolators, urethane sway bar bolts and the alignment. The car rides very good, no bottoming out, better control and handling and no wheel rub with 17"x 9" Cobra 5-spoke wheels w/ 245's all around. The initial drop in front was 1", I think it will settle a bit more, the rear was 3/4". Looks great too, it was the right choice for me.


    Year: 2003 Submodel: GT CA

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    June 04, 2013

    Gave my 13 yr old vert the handling and stance it needed

    So I grabbed this used 2000 GT Convetrible three weeks ago and gave it a major overhaul. Paint, interior etc etc. The last item on the list suspension. Grabbed this springs from AM in person. Installed and it made my 4x4 looking 2000 GT like the mean machine it should be. Improved handling, stance and overall appearance. Plus it is FRPP so it is warrantied by Ford Thankfully i replaced when I did as my stock original springs were actually broken at the isolator rings in the front suspension. Fair Price, picked up in person and typical AM quality service Why go with anything but FRPP parts for your stang?


    Year: 2000 Submodel: GT Philly

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    January 30, 2013

    Awesome springs

    These springs are GREAT! They improved the ride very much and the handling as well. Make sure to get the Spring Isolators. And if you have never put springs on, have your local shop do it. The front springs are a pain!


    Year: 1988 Submodel: GT Wilmington, OH 45177, USA

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    September 09, 2012

    oh yeah

    This coupled with the kyb shocks/struts makes the mustang ride so much different. The shocks are soft for daily driving except when the road gets out of hand, or you wanna open her up a lil. Best spring to get for city driving because it gives slight lee-way until the road requires more stiffness.


    Year: 2003 Submodel: GT Brooklyn, NY

    Helpful (2)

  • 4/5

    Installation Time: Afternoon

    May 28, 2017

    good street spring

    I picked up some Koni orange struts/shocks with these springs. Car sits great and its not too low. Ride is almost plush but firm enough to keep the car in check over bumps and pot holes. Very quiet and smooth ride. I would like a touch stiffer spring rate but for street use these are perfect.


    Year: 1995 Submodel: GT

    Helpful (1)

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