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SuperSprings Custom Suspension Stabilizer and Sway Control Kit

SuperSprings Custom Suspension Stabilizer and Sway Control Kit

Item # SSA25
Our Price: $648.99
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Vehicle Suspension

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3,400-lb Capacity. Upgrade your rear suspension by installing these helper leaf springs above your vehicle's factory leaf springs. They significantly reduce sway and prevent sagging, which is perfect for towing or hauling heavy loads. Great Prices for the best vehicle suspension from SuperSprings Intl. SuperSprings Custom Suspension Stabilizer and Sway Control Kit part number SSA25 can be ordered online at or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SSA25

  • Leaf Springs
  • Rear Axle Suspension Enhancement
  • Standard Duty
  • SuperSprings Intl

3,400-lb Capacity. Upgrade your rear suspension by installing these helper leaf springs above your vehicle's factory leaf springs. They significantly reduce sway and prevent sagging, which is perfect for towing or hauling heavy loads.


  • Reinforce your vehicle's rear suspension with extra leaf springs that prevent sagging and reduce sway by up to 30 percent
    • Work like sway bars to stabilize your OEM springs and keep them from twisting
    • Compensate for windy conditions, wind turbulence from big rigs, and weight shifts from cornering
    • Lift your truck when you are carrying a heavy load and prevent bottoming out
  • Adjust automatically to your payload
    • Rollers on each end of the SuperSprings activate when the OEM springs flex under load
    • Rollers deactivate when OEM springs aren't under load
  • Can be customized - the shackles attaching the SuperSprings provide several options for installation
    • Choose a setting that increases load support and ride height for constant heavy loads or to compensate for minor spring fatigue in an older automobile
    • Choose a setting that maintains the original factory ride conditions and minimizes effect on unloaded ride quality and height
    • Choose a medium setting that balances support, height, and ride comfort
  • Install easily - bolt on above your existing factory springs with no drilling required
    • For some models with factory springs that sit above the axle, the included poly spring pads prevent shifting
    • Dense polyurethane blocks seat between the top of the factory springs and the underside of the SuperSprings
  • Require no maintenance - no tubing or air pressure to monitor or adjust like air springs
  • Extend the life of brakes, tires, and factory suspension
  • Made in the USA


  • Weight capacity: 3,400 lbs
    • SuperSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

Overload Spring vs. Leaf Spring

Note: This kit is designed to fit a vehicle with factory top overload springs. As shown in the picture above, a top overload spring sits above the factory leaf spring pack.

SuperSprings diagram of roller and shackle system for extra leaf spring

These additional leaf springs add support and sway control to your existing OEM suspension. Just bolt on SuperSprings over your existing factory springs, and they automatically work when you need them. As the factory spring flexes, a roller at each end of the beefy helper spring reacts to engage the helper spring and to provide extra support. The springs help to better distribute cargo weight throughout your existing suspension, channeling that weight to the points on the frame that are designed to support heavy loads.

SuperSprings leaf spring installed on a vehicle

Placing these leaf springs above your factory springs helps to keep your OEM springs from twisting, so the SuperSprings act like a sway bar, reducing the body roll that makes driving more difficult and dangerous. With these helper springs, driving is safer and easier when it's windy, when your vehicle is rocked by a passing semi, and when you are cornering. The springs help to reduce sway by up to 30 percent. SuperSprings also allow more wheel travel in the rear suspension when they are under load, so they maintain traction and ride comfort better than rubber or polyurethane bumpers. That means they're great for drivers who frequently tow.

Truck before SuperSpringsTruck after SuperSprings

You can also customize the level of support provided by SuperSprings. For most models, the shackles that attach the helper leaf springs to your existing leaf springs have several installation options:

  • For greater support and ride height when your suspension is under a constant load or if you have an older automobile with some spring fatigue, install the helper springs using the upper bolt holes
  • To maintain the factory ride and reduce the effect on your ride height, install using the lower bolt holes
  • To balance support, height, and ride comfort, install using the upper hole on one end and the lower hole on the other

SuperSprings are a maintenance-free, low-cost alternative to air spring systems, which require constant monitoring and air pressure adjustment. These helper leaf springs respond automatically to the load you carry, so there is no crawling under your truck to adjust them. You'll also reduce wear and tear on your suspension, brakes, and tires, which saves you money. The bolt-on installation means that they are easy to fit - no drilling required.

SSA25 Super Springs Leaf Spring Suspension Enhancer - Anti Sway

Installation Details SSA25 Installation instructions

This Product Fits The Following Vehicles

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Customer Reviews

SuperSprings Custom Suspension Stabilizer and Sway Control Kit - SSA25

Average Customer Rating:  4.6 out of 5 stars   (224 Customer Reviews)

3,400-lb Capacity. Upgrade your rear suspension by installing these helper leaf springs above your vehicle's factory leaf springs. They significantly reduce sway and prevent sagging, which is perfect for towing or hauling heavy loads.


After listening to my new trucks squeaky suspension for almost a year and installing air bags that were useless, I tried these springs and these are the best investment I’ve made for my work truck.
No more squatting and the best part no more squeaking!


The supersprings are simple to install. Good instructions. They have done a great job on helping with weight. The Poly Spring Pads do not last. I have had this setup for 7 months and the pads are falling apart.



Installed it about a year ago. The springs are working out great. I don’t have the sagging of the rear end like I use to when towing. I have had to replace the pads once, but besides that, it’s a awesome system.


Their website makes it easy to find the right Superspring for your truck. They install easily and work great. The only thing that was a surprise is that I had to use a 6" c-clamp to compress the spring enough to get the rollers on. No big deal, but nothing was mentioned about a spring compressor on the "tools needed" list.

2011 Ford F-250 Super Duty

Correct product shipped promptly. Shipping carton was completely open and nearly ripped in half, but all components survived and made it to me.
Installation time was about 2.5 hours. I'm not a mechanic by any means, but overall it wasn't too bad. A couple of things for F250 owners (mine is a 2011):
1. You will have to remove a brake line bracket on the driver's side to install the rubber spacer. I re-installed the bracket onto one side of the U-bolt that is installed on the spring.
2. There is no way to insert the roller bolt on the front of the driver's side spring - not enough clearance. I had to completely remove the swing arms, pre-install the roller bolt, and the piece it back together once in place. Wasn't hard, just took some extra thinking.
3. The thing I was most worried about was compressing the spring in order to insert the rollers. Obviously the front goes on no problem. For the back, I chose to use a small bottle jack. I placed it on top of the SuperSpring and extended the jack so it pushed up on the bottom of the bed of the truck. This easily and quickly compressed the spring.

Unloaded ride height was unchanged. I'm hoping to test it pulling our travel trailer in the next couple of days and will update on how it works under load.


Love the super springs. They keep my truck from sagging which gives me complete vehicle control. Would recommend for someone that tows often.

Ford F-250 Super Duty

Took the squat out of the F250 when pulling our fifth wheel.


Great product !


work's Great , I will be purchasing mor e.

2019 Ford F-350 Cab and Chassis

Item is in great condition but the shipping box was completely torn up


2016 Ford F-350 Cab and Chassis


2020 Ford F-450 Super Duty


2010 Chrysler Town and Country

2019 Ford F-550 Cab and Chassis


2020 Ford F-450 Super Duty


No issues with install on a 2023, E350 Class C motorhome.
After chalking the front wheels, I used two 3 ton floor jacks with 13” 6x6 blocks just behind the springs to lift the frame and rear tires off the ground to remove the wheels. For safety, 3 ton jack stands were put under the axles during spring installation
After installing the springs per manufacturer instructions, two 1/2” x 10” pieces of all thread with drilled flat bar were used to compress the front end spring.
With the least amount of preload it raised the back a good inch.
The 800# trailer tongue weight will be the next test to see if more preload is needed for a level ride height.


The Super Springs work great! I pull a 8,500# trailer with a hitch weight of 950# with a 2004 GMC Sierra 1/2 Ton. The truck pulls fine but even with an equalizer hitch still had some sag. The Super Springs were easy to install and leveled the rig. After a year everything still works great.


Great product, very clear instructions. I really appreciated the stickers on each spring showing the correct orientation, that took all of the guess work out of it.

Thanks Supersprings for making a great kit and confirming the product would work with the airbags I had installed.


I got this to prevent bottoming out my truck when towing our travel trailer. Won't know for sure if this actually works until we load up. Having said that, the instructions provided with this are poor and talking with Supersprings tech support was frustrating. As mentioned elsewhere, you will need two "C" clamps to pre-load the spring and I wound up fabricating a 3" extension bracket for the brake lines; neither of which were mentioned in the instructions. I also removed the wheels to provide working space and air tools are definitely the way to go. On my '13 Tundra, the distance between the stock spring pack straps is 40" the same as the distance between the eyes on the Superspring. I was advised that the spring is mounted off-center to avoid conflict with the stock spring straps; however this in not mentioned in the instructions. This placed the Superspring about 4" forward of the center of the axel instead of centered on the axel. (see photos) This seems counterintuitive to me but we'll see. This added 1.5" in height to the rear of the truck. It took me 4 hours to install by my self, including time to fabricate the brake line extensions and dealing with Supersprings staff twice on the phone. During the second call, the tech mentioned that they get a lot of phone calls for Tundra installs, indicating to me that they already know there are issues with the product and instructions. In retrospect, I would look for a new spring pack if I was doing this again. Hopefully my suspicions are unfounded but I'm hanging on to the box just incase. Etrailer was great with the best price anywhere and quick shipping.


Installed on a 2016 Toyota Tundra. I pull a 28 foot aluminum frame utility trailer. Hauls like a 3/4 ton with super spring. Rides like 1/2 ton without load. I have put 1 ton load on truck with no trailer and the truck drove fine. The front of truck at tires rose 1/2 inch. Installation requires the frame to be lifted off the rear of vehicle. I like this system better than air shocks as there is no adjustment after installation. I would purchase again.


The kit looks really good but I can’t figure out how to install. Enclosed are two photos showing my van suspension and the parts your sent. The instructions do not show my van with only one spring. Can you advise?????????????? Thanks.


This helped immensely with the wondering in the steering of my e350. The shop that I had install it has been recommending this to their customers

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Does SuperSprings for 2020 Ford F-450 Super Duty Replace Entire Leaf Spring
    The SuperSprings # SSA25 are a really solid choice for suspension enhancement for your 2020 Ford F-450 and they do not replace your leaf springs. They actually install on top of the springs you have now and provide additional support. If you check out the picture I attached you can see how it installs.
    view full answer...
    Image 1 for
  • SuperSprings Suspension Stabilizer for 2017 Ford F-250
    I confirmed with SuperSprings that the Suspension Stabilizer and Sway Control Kit # SSA25 will fit your 2017 Ford F-250. The kit will work on your truck with 4-wheel or 2-wheel drive.
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  • Will SuperSprings Fit My 2017 Ford F-250 Super Duty with Overload Springs?
    Yes, you can use the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA25 for your 2017 Ford F-250 Super Duty and they will fit with the top overload springs! Attached is a review video for you to check out.
    view full answer...
  • Plate Used To Install SuperSpring Kit SSA25 in 2017 Ford F-250
    I attached a picture that shows how the PSP7 plate of the # SSA25 is installed on your 2017 Ford F-350. Both sets of the plates would not be needed.
    view full answer...
    Image 1 for
  • Compatibility of SuperSprings SSA17 on 2008 Jayco Seneca 36FS On Chevy Kodiak Chassis
    According to my research, the # SSA17 is compatible with your 2008 Jayco Class C motorhome on the Chevy Kodiak chassis. The kit should have included all the necessary installation hardware. I'll have our Customer Service folks reach out to you regarding the missing hardware. You can see the installation instructions by using the provided link. The # SSA25 is also a fit, but it actually offers a lower weight capacity (3400lbs) versus the 5000 lb capacity of the # SSA17, so I believe the...
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  • Recommended SuperSpring Suspension Enhancement For A 2019 Ford F-250
    The capacity of the suspension enhancement you install will not increase or replace the capacity that your vehicle currently has. These enhancements are really just to help support your truck's suspension and reduce sag so to improve your ride quality and reduce sag. SuperSprings are essentially just adding on a extra leaf to the spring stack to help stiffen your leaf springs and reduce the flex when a heavy load is placed on them. The capacity of the spring can vary from model to model...
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  • Recommended SuperSprings Custom Suspension Stabilizer And Sway Control Kit For 2015 Ford F-350
    I have another option for you but the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA17 you were looking at will not work on your 2015 Ford F-350 due to the kit being designed for the Ford F-450/550 cab and chassis, which is commonly used for motorhomes and uses different suspension components. When I reached out to SuperSprings they mentioned that the main differences was the # SSA17 is nearly 1.5" taller than the kit for your F-350 to accommodate the larger frame...
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  • Will SuperSprings Kit for 2001 Ram 2500 4x4 Make Ride Quality Harsh
    The SuperSprings kit part # SSA25 that fits your 2001 Ram 2500 4x4 will not make the ride quality harsh like some options do. It will give you a great balance between additional support like you are wanting and ride quality.
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  • Can Air Bags be Installed on a 2013 Ford Super Duty with Reese Elite Series 5th Wheel Install Kit
    Based on where the Reese Elite Series kit # RP30126 installs you will not be able to install air bags due to the mounting requirements of the upper air bag brackets. I checked several brands and came to the same conclusion with all of them. But there are alternatives to air bags. One option is a set of SuperSprings # SSA22 which will provide additional support, reduce sag, and increase vehicle stability. There is also a model with a little more capacity, # SSA25, rated at 3,300 pounds...
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  • SuperSprings For a 2023 Ford F-250 Built After January 1st
    For your 2023 Ford F-250 built after the 1st of the year you have a few different option SuperSprings. You will want to select the correct system based on the amount of weight you intend to carry. 1,400LB # SS94VR 2,500LB # SSA22 3,400LB # SSA25 The 3,400lb kit is recommended for applications which constantly carry heavy loads such as trucks with contractor beds installed.
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  • Suspension Enhancement Recommendation for a 2009 Ford E-450 Van Motorhome Dually V-10
    We do have some options for your 2009 Ford E-450 motorhome. I recommend going with SuperSprings Suspension enhancement, # SSA25, which is for heavy duty application. These springs will help to reduce sway and prevent the vehicle from sagging when carry heavy loads. I have included a link to the installation details for reference.
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  • Recommended Leaf Spring Helpers for Thor Class C Motorhome on Ford Chassis
    We do offer suspension enhancements for a Thor Motorhome on Ford Chassis. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit part # SSA25 are what I recommend. They will fit dually cutaway models, both the E-450 (Class C) and F-450 (Super Class-C Diesel). They provide up to 3,400 lbs of support which will take some strain off the factory leaf springs. This should then give you more ground clearance. Please note, if you are overloading and leaf springs are bent because of...
    view full answer...
  • Suspension Enhancement for 1999 Dodge Ram 3500 With B&W Gooseneck Hitch
    I have a solution, but none of the air bags that fit your 1999 Dodge Ram 3500 are compatible with an in-bed hitch. If you're looking for additional support I recommend using the SuperSprings Custom Suspension Stabilizer # SSA25. These will reinforce your rear suspension reducing sag and sway. They have a 3,400 lb weight capacity and a bolt-on installation. They also come with a limited lifetime warranty and a a 30-Day satisfaction guarantee.
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  • Can You Install a SuperSprings Stabilizer and Sway Control Kit With an Air Lift Loadlifter 5000
    Though we do not carry the Hellwig product, from what I could find, the SuperSprings # SSA25 kit will install much the same way. As I wasn't 100% on that, I called over and spoke to one of the Techs at SuperSprings and they confirmed that it would have to be one system or the other, unfortunately. With the adjustability of the Air Lift Loadlifter 5000 # AL57391, I suggest staying with this system over the SuperSpings # SSA25 set it and forget it style system.
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  • Suspension Enhancement for 2018 Ford F-450 Super Duty
    You are correct that Air Lift specifies the # AL88399 cannot be used on dual rear wheel models, which is what the 2018 Ford F-450 pickup has standard so they would not work for your truck. The best suspension enhancement for this truck is going to be the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA25; I checked with SuperSprings and this kit is a fit for your truck. This kit is a helper leaf spring which has different settings which allow you to choose the best...
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  • Will the SuperSprings Custom Suspension Stabilizer Work On 07 F-350 With Broken or Missing Overload
    The SuperSprings Custom Suspension Stabilizer and Sway Control Kit part # SSA22 requires a top factory overload spring in order to work. If the spring is missing or broken then it cannot be used. Instead, the SumoSprings Solo Custom Helper Springs part # SSR-114-47 which is a fit for a 2007 Ford F-350 would be a better option.
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  • Is Drilling Required to Install the TorkLift StableLoad Rear Suspension Upgrade # TLA7311
    The TorkLift StableLoad Rear Suspension Upgrade # TLA7311 that you referenced will require you to drill the leaf springs for installation. We do offer a few other solutions for your 2001 Dodge Ram that will allow you to install them without drilling into the leaf springs. You could use the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA25 if your have a 2500 or 3500. If, however, you have a 1500 then you can use part # SSA5MTKT instead. These stabilizers will supplement...
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  • What SuperSprings Should Be Used in a Ford F-250 w/ In-Bed Camper Permanently Mounted in the Bed
    Typically with the weights you mentioned I would go with the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA22 which is the 2,500 lb. kit. But with your camper being a permanent mount, I would go with the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA25 which is the 3,400 lb. kit. The reason I would go this route is because you have a constant load and the 3,400 lb. kit is better suited for a constant load than the 2,500 lb. kit. If you plan...
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  • Will SuperSprings Fit 2013 Ford F-250 or F-350 Without Factory Overload Springs
    I checked with the manufacturer, SuperSprings, for you and each of the SuperSprings kits will fit your 2013 Ford F-250 or F-350 Super Duty that does not have factory overload springs. These are an excellent upgrade to your suspension because they have so many benefits; the SuperSprings will help level out your truck, reduce sway, and give you better handling with the support it adds to your rear suspension. The only thing you'll need to do is pick the correct option for your application...
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  • Will SuperSprings and Rear Anti-Sway Bar Work Well Together On a 2014 Ford F-350
    The SuperSprings Custom Suspension Stabilizer Kit part # SSA22 is a great option for a 2014 Ford F-350. It will do a great job of helping to providing extra support when towing or hauling. It can then be used with the Roadmaster Rear Anti-Sway Bar and End Link Kit part # RM-1139-173-00 no problem. The combination of the two should not be an issue as they really are designed for different purposes, weight distribution and sway respectively.
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  • Can Firestone Air Bags be Installed With a SuperSprings Sway Control Kit?
    I spoke to one SuperSprings about installing their Custom Suspension Stabilizer and Sway Control Kit # SSA25 in unison with your Firestone # F95FV on your 2021 Ford F-250, and it may work. There was only one thing they mentioned needing to be checked to confirm they wont interfere with each other. With that said, as long as there are no air lines in the way, you will be good to go. The SuperSprings # SSA25 will supplement the Firestone kit if needed, but will also help with sway, so I...
    view full answer...
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  • SuperSpring Suspension Kit Recommendation for 2005 Chevy Kodiak
    We have Superspring kits that are a confirmed fit for your 2005 Chevy Kodiak. For the rear axle you'd need the part # SSA25 and then for the front you'd want the # SSF-281-47 which is the leaf spring style. This setup gives you a SumoSpring in the front and the Superspring leaf style out back. There isn't a Sumo for the rear of your vehicle so this would be your best and only fitting option.
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  • Best Suspension Enhancement for 2021 Ford F-250 with Camper Shell Towing Trailer
    For your 2021 Ford F-250 that you are wanting suspension enhancement for that improves traction, stability, is anti-sway, and reduces sag the best option hands-down is the RoadActive Suspension Kit part # RAS3611-SLHD. This option destroys the competition because it is the best of all worlds. You get an easy install, easily adjustable support, improved handling, reduced body roll, and improved ride quality loaded and unloaded. Most other options you can pick two of the things I mentioned...
    view full answer...
  • Can Air Bags be Installed on a 2001 Dodge Ram 2500 4x4 with Curt Gooseneck C60734
    The upper brackets for Firestone air bags # F2220 bolt through the frame but the frame brackets for Curt gooseneck hitch # C60734 do not have holes in them to accommodate this so this particular set up will not work together. If you could tell me if your Ram is a 1500, 2500, or 3500 as well as if it is 2- or 4-wheel drive, and if you already have the gooseneck hitch or air bags (or both or neither) I can see if we have some combination that will work for you.
    view full answer...

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Info for this part was:

Employee Andrew K
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Employee Kathleen M
Installed by:
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Employee Robert C
Installed by:
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Employee Mary K
Updated by:
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