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

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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 americanmuscle.com. 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 americanmuscle.com. 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 americanmuscle.com.

    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
    • Cobra - 93, 94, 95, 96, 97, 98
    • Cobra R - 95
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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    23 Questions / 31 Answers

    Ask a Question

    Does changing the isolators effect the lowering distance

    DonM

    • Adding isolators with the Ford Performance Lowering B-Springs will not affect how much the car is going to drop.

      AshleyK

    Helpful (3)

    does the v6 engine weight compared to v8 make a difference in the distance lowered I have a 2000 v6 convertible

    DonM

    • The difference in weight between the engines will not make much of a difference when it comes to the Ford Performance Lowering B-Springs. They will lower the car approximately 1-1/8" in the front and 3/4" in the rear.

      AshleyK

    Helpful (2)

    Will i need CC Plates with these springs?

    PedroB

    • 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.

      AMKody

    Helpful (2)

    are " factory specs" the same before lowering springs and after. My alignment guy wasn't sure if his machine would work accurately with springs lowered. It sounded like it would do an automatic calibration. Any thoughts. I am a little confused and would like to be sure.

    DonM

    • We highly suggest getting an alignment done after installing the Ford Performance Lowering B-Springs. Whenever changing suspension components, the alignment can slightly change. An alignment shop will be able to get the car back to factory alignment.

      AshleyK

    Helpful (1)

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

    Gio19

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

      Rob D

    Helpful (1)

    I spoke to a dealer about alignment after the installation. He said his 4 wheels alignment set up restores to factory specs. Would this be An acceptable alignment after installing these B springs?

    DonM

    • It is highly recommended to get a four wheel alignment done after installing the Ford Performance Lowering B-Springs. This will ensure that no unnecessary wear happens to the tires and the suspension.

      AshleyK

    Helpful (0)

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    Customer Reviews (70) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Handling Improvement 4.491803 4.5
    • Ride Quality 4.693548 4.7
    • Appearance 4.66129 4.7
    • Bang For Your Buck 4.725806 4.7



    • 3/5

      Installation Time: Full Day

      July 09, 2018

      B springs

      Same as any other lowering springs Ive had on the car

      J

      Year: 2003 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      May 07, 2018

      Perfect for daily driver!

      After a lot of research I decided to purchase these springs. At one point I had my mustang on SR coilovers and hated them and had alignment issues even with the CC plates. So I put in new motor-craft shocks and struts and Bilstein quad shocks and the original springs last year. I could not stand the factory wheel gap anymore and decided to purchase these springs. Install took about a full day for me doing it in my garage. When you are doing the front do not even drop the tie rods, I was able to use a pry bar to remove and put the new springs in without dropping/unbolting the tie rods. Also, on the back I just unbolted the bottom shock bolt and quad shock bolt and was able to install the backs very quickly. I was not sure if I would be able to get the car aligned without CC plates but took the chance. Got the car aligned today with no issues. Ride is firm but not back breaking and it lowered the car about an inch all the way around. I have Long tubes installed so I did not want to drop the car much more than that. Overall I love these springs!

      StevenM

      Year: 2003 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 17, 2018

      B Springs

      Installed on a 91gt fox body with bbk isolaters. Gave the car a nice stance didnt slam it to the ground. The car rides and feels 100 better.

      BrianS

      Year: 1991 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      March 02, 2018

      Amazing Handling!!

      These springs gave my mustang an amazing aggressive stance. And the most important part is performance. These springs keep my pony glued to the ground. GREAT PRODUCT! Don't forget to replace the Isolators too! It took me a little longer. I installed the BBK rear control arm kit at the same time. Both amazing!

      darkhorsegt

      Year: 2000 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      February 06, 2018

      Awesome performance

      Well worth the money, and way better than stock, performance and the they lower the car just enough for it not to look like a truck lol

      santiago

      Year: 1995 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      January 12, 2018

      Mustang

      Very fast shipping and as described and install was as described

      LeonR

      Year: 1999 Submodel: V6

      Helpful (2)

    • 5/5

      January 10, 2018

      Springs

      Great product, took out the way too low for me springs and put these in. Love the ride and stance.

      NickK

      Year: 1993 Submodel: LX

      Helpful (2)

    • 5/5

      November 12, 2017

      Good riding comfort

      Excellent and smooth i can suggest to all has mustang riding comfort issue, try this one

      EddieS

      Year: 2000 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      September 11, 2017

      worth the money

      had some lowering springs that were feeling every bump in NYC switch to these B springs and now my car rides a lot smoother over bumps plus it gives me my clearance back to put a jack under the vehicle great buy would recommend thanks AM for the deal and quick delivery A

      frank365

      Year: 1999 Submodel: V6

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      August 07, 2017

      Great Improvement Over Stock

      These lowering B springs were a huge improvement over the stock ones the car had that were worn out. Handling is much more predictable and I was able to take a turn at over 70 mph that I previously had trouble with going 55 mph. For the only handling improvement done on the car being these springs that is a huge difference. The install was an absolute pain, however this was mainly because the employee at the auto parts store gave me a incorrect spring compressor which caused the install to take an extra five hours. If you have stock factory springs, they will not just pop out or fall out as shown in the video when the A arm and axle are lowered, and you will need a spring compressor to even install the new ones, so keep that in mind when preparing for the install. I only gave it a four star for appearance as I still have my stock wheels and I think to get the look as shown on the AM website you would need at least 17" rims (stock ones are 16"). The wheel gap is still a little much however it is 50 of what it was with the stock springs, so when I do get new rims for the car I have no doubt that it will look perfect. I wouldn't recommend going any lower than this if the car is your daily, as even with these B springs any speed-bump that is slightly tall you WILL scrape on. All and all It was worth the purchase from just the handling improvement, and the ride height is a great improvement over stock as well.

      ChrisM

      Year: 2002 Submodel: V6

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      July 28, 2017

      Great street spring

      My mustang had race springs when I bought it and scraped on everything. It looked cool but rode harshly. These springs ride and handle great, the stance is about halfway between stock and slammed. Very happy with these springs.

      SeanF

      Year: 2003 Submodel: GT

      Helpful (3)

    • 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.

      DennisK

      Year: 1995 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      May 09, 2017

      Best of Both

      Really great springs for the money, They really changed the ride quality on my GT. They're the right balance of Performance and Ride quality because they feel nice and when cornering but aren't super stiff when riding around everyday. Pretty nice drop in height as well. Not super low you're scraping over bumps, but enough so you're ride looks good. Would recommend!

      GerardoA

      Year: 1998 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 27, 2017

      Love them!!!!!

      I had these installed on my 04 GT a few weeks ago and needless to say I hated the look at first but It grew on me. My car had cut springs and running the tire size I was running(275/40/R18) my tires hit all the time. Now they don't hit on bumps or at full lock. I paired these springs with a pair of KYB struts and shocks and it rides amazing, stance is a little tall though.

      MorrisT

      Year: 2004 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      March 15, 2017

      Perfect

      These springs are perfect for lowering the car a tiny bit and maintaining awesome ride quality.

      Stan

      Year: 2002 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      February 27, 2017

      Sitting pretty

      Gave me the look I was after. Ride quality is outstanding.

      HerbertM

      Year: 1986 Submodel: Other

      Helpful (2)

    • 5/5

      January 25, 2017

      Perfect Convertible Springs

      Ford B springs gave my 1990 vert the exact look I was looking for with 17inch wheels..

      Brownboy29

      Year: 1990 Submodel: GT

      Helpful (6)

    • 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.

      Skimakoyi

      Year: 1999 Submodel: V6

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      December 06, 2016

      Simple

      Easy to install car stance awesome . Handling improved great ride

      Smoke

      Year: 2001 Submodel: GT

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      November 18, 2016

      Great looks without handling compromise

      I bought these springs because I enjoyed the factory spring rate, but wanted the car to sit lower in the front. So far, the handling improvement is negligible, which isn't bad considering the car handled excellent before. The ride has been compromised slightly. A little bouncy, but nothing I can't live with. The drop is exactly what I wanted. For under $300 it was a great deal.

      slowfiveoh

      Year: 1991 Submodel: GT

      Helpful (2)

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