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Ford Performance Lowering B-Springs - Coupe & Convertible (79-04 GT, V6, Mach 1; 93-98 Cobra)

Market Price $234.59 You Save 13% ($30.60)
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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

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

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Most Helpful Reviews

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 ...

Read More
Helpful (1)

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 ...

Read More
Helpful (2)

Overall Rating 4.8 out of 5 stars
Read All 55 Reviews

Customer Photos (40) Submit Your Photo

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15 Questions / 6 Answers

Ask a Question

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


Helpful (0)
  • Unfortunately, the suspension between the years are very different. The springs are most likely not interchangeable.


What shocks and struts would you recommend with these springs?


Helpful (0)
  • 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.


I have an 03 v6 with 18x8 wheels off of a 2015 mustang. Would these springs work, or would I not have enough clearance? Tire width is 235/50


Helpful (0)
  • If you are running 18x8's you will have enough clearance to use these in conjunction with your wheels and tires.


Hello I have an 04 GT convertible. Would these springs be a better choice than the G springs? I do not want to lower too much for my catted x pipe hangs a bit low. Would I need casters with these? Would it be wise to change out the quad shock and if so do you only carry the Bilstein? Would the Koni str shocks be a good choice for shocks / struts? Just trying to get a little more performance out of the car. Thank you for any help..


Helpful (0)
  • Hello, That decision is really going to be up to you since it will be more opinion based on how they both ride. I am more of a fan of the B-Springs and think you may like them a little more. -You will not need caster camber plates with these springs but they are certainly recommended to help ensure your car is properly aligned after install. -Installing these springs should not have any affect on the quad shock. From my personal experience, the quad shock seems to be an unnecessary part that can actually be removed and will not affect your car's ride or performance in any way. -The KONI shocks and struts are a great part to combine with lowering springs. This will definitely give you a huge improvement in the ride and handling of your car when installing both of these components together. I recommend the KONI STR's as well they are a great combination.


So I'm trying to lower my 1985 v6 convertible as little as possible. would this be a good choice?


Helpful (0)
  • The Ford Performance Lowering B-Springs offers one of the smallest change in ride height, however, the Ford Performance Lowering C-Springs offer the same drop in height. The B-springs have a progressive spring rate, where the C-Springs use a linear rate. If you were perhaps interested in a coil-over kit, you can adjust the ride height to the factory settings on most units.


Fox body: What I be better off with the lowering springs manufactured by Ford Racing or Eibach Pro Sport series. I'm going to run 17" wheels with 245 tires. Price difference is not an issue, but bottoming out is as well as overall ride quality. Car has Koni adjustable Structs / shocks on it and it's mostly used for street / strip.


Helpful (0)
  • It would depend on a few other factors, if your Fox is a coupe or convertible, and the amount of power, to determine which spring rate would be best to handle the weight of the vehicle and the amount of squat produced from high powered vehicles. The Ford Performance Lowering B-Springs only lower the vehicle about an inch in the front and half inch in the rear were both the Eibach Sportline and Pro-kit offer a 1.5 inch drop in height all around. If you wheels are wider or have a low or negative offset, it can caused some rubbing, and prevent full articulation. If would be difficult to say exactly what will occur on your set-up without all the details, however, if you could give us a call at your earliest convenience, we would be more than happy to assist you!


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Customer Reviews (55) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Handling Improvement 4.521739 4.5
  • Ride Quality 4.680851 4.7
  • Appearance 4.723404 4.7
  • Bang For Your Buck 4.744681 4.7

  • 5/5

    Installation Time: Full Day

    January 23, 2017

    Much Needed Upgrade

    My 99' Mustang has 225/55R16 tires aftermarket wheels and it had stock springs, shocks, and struts. With the original suspension pieces the profile looked, what many have said, like the ride height should be for a SUV. After months of researching and saving it finally came time for these parts to be replaced as they were shot, or at least the shocks and struts were. I bought the B-springs because I wanted a moderately lowered look without loosing too much of the ride quality. However, I wanted a better handling car. All of these are hard to do because you can't have them all without having tons of money. So, I chose these over the Eibach Sports-line for V6's because those were on the edge of needing caster camber plates (1.5" lowering) and over the C's because they seemed too stiff for what I was looking for. After a long day (about 6.5 hours) of my dad and I installing these with Koni STR-T's (Orange), poly isolators, poly bumpstops, and using only the TOP poly strut tower bushings I can definitely say I didn't waste money on these. The car is so fun to drive! It's the best car I've ever had. I probably could have gone a little stiffer on the springs (maybe the C's) but I'm very happy with this ride. You can feel the road and the profile is pretty sharp. for my setup I am currently at about 27.75" all around.


    Year: 1999 Submodel: V6

    Helpful (1)

  • 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 (1)

  • 4/5

    August 17, 2016

    ford racing springs

    Did like the look of the lower stance. a little harder ride than I expected, waiting for the springs to break in so the shocks can do more softening of the bumps... particularly in the back. Running KYB shocks probably should have got the Koni Do get some slight rubbing when the whels are locked out or going up a rise with the wheel turned


    Year: 2001 Submodel: V6

    Helpful (1)

  • 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)

  • 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 (2)

  • 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 (14)

  • 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 (7)

  • 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 (6)

  • 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 (5)

  • 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 (9)

  • 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)

  • 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 (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

    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 (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

    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)

  • 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 (1)

  • 5/5

    Installation Time: Afternoon

    September 13, 2015

    Ford B springs

    Had the springs installed by a shop, on a 95 GT convertible 5.0. They replaced the original springs with 75,000 miles on them. Car lowered 1.5 in the front and 1.0 in the rear, which turned out to be just right. Anymore and I would be scraping the frame or damaging the front air dam more frequently than normal........... I was surprised by the ride, it was still good for the street. I also replaced the shocks with a slight upgrade. The handling improvement is very apparent, particularly in faster corners, but also noticeable in slow hard turns. The car would squat under hard acceleration with the original set up, it now stays flat and much more predictable with the change. Very satisfied with the modification.


    Year: 1995 Submodel: GT Louisville

    Helpful (1)

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