Product Experts Available Now!
Call 1-800-940-8924
THIS ITEM IS NOT A FIT FOR
2003 Volvo V40
We'll connect you with nearby partnered installers who know this exact setup.
SuperSprings Custom Suspension Stabilizer and Sway Control Kit
Part Number: SSA8
In Stock
$517.99
2003 Volvo V40
Will this fit?
To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
We'll connect you with nearby partnered installers who know this exact setup.
- All Info
- Reviews (314)
- Q & A (0)
- Videos (2)
- Photos
SuperSprings Intl Vehicle Suspension - SSA8
Highlights
- Custom Fit for Your Vehicle: Mounts to existing attachment points
- 1,500-lb Load Support: Keeps your truck level and prevents sagging when towing or hauling heavy gear.
- Smoother, Safer Handling: Reduces sway by up to 30% so steering and braking stay steady under load.
- No Upkeep Needed: Works automatically with no air lines, pressure checks, or maintenance required.
- Custom Ride Height Options: Choose shackle settings to fine-tune support, height, and ride comfort.
- Simple Bolt-On Install: Mounts above factory springs with no drilling for quick DIY setup.
Features to know about
Stay Level Under Load: 1,500-lb Rear Suspension Support
When you hitch up a trailer or load heavy gear in the bed, rear-end sag can throw off how your truck handles and brakes. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds 1,500 lbs of extra support by mounting helper leaf springs above your factory springs. They automatically engage when your stock suspension flexes under weight, lifting the rear and keeping the vehicle level so steering and braking feel balanced even with a full load.
Reduce Sway and Body Roll: Up to 30 Percent More Stability
Crosswinds, big-rig turbulence, or quick turns can make your truck rock side to side. These helper springs act like sway bars by keeping your factory springs from twisting. That reduces body roll and sway by up to 30 percent, so handling stays predictable on highways, curves, and uneven ground. You’ll notice a steadier ride when towing or hauling heavy cargo.
Automatic Load Response: No Air Lines or Adjustments
Unlike air bags that need constant checks, SuperSprings work automatically with no tubing or air pressure to monitor. As your OEM springs flex under weight, rollers at each end of the helper spring activate to add support; when you’re unloaded, they deactivate for factory-like comfort. It’s a maintenance-free way to get reliable load leveling without extra setup.
Customizable Ride Setup: Bolt-On Options for Support and Height
The shackles that attach each SuperSpring let you choose how much extra support and height you want. Use the upper bolt holes for more load support or older suspensions showing fatigue, the lower holes to stay close to factory ride feel, or a mixed setup for balanced comfort and lift. Installation is straightforward—these springs bolt above your existing leaf pack with no drilling required.
Built to Last and Protect Your Truck’s Components
Dense polyurethane spring pads keep parts from shifting on certain setups, while the reinforced design helps extend the life of brakes, tires, and factory suspension components. By spreading load forces across the frame points built for heavy duty work, these helper springs make towing and hauling smoother, safer, and easier on your truck over time.
Specs
Weight and Capacity
- Weight capacity: 1,500 lbs
Warranty
- Limited lifetime warranty
- 30-Day satisfaction guarantee
SSA8 Super Springs Leaf Spring Suspension Enhancer - Anti Sway
This Product Fits The Following Vehicles
- 2008 - 2008 Four Winds 5000 Motorhome 21RB - Ford
- 2007 - 2009 Winnebago Access Motorhome 22B
- 2007 - 2007 Winnebago Access Motorhome 24V
- 2008 - 2013 Winnebago Access Motorhome 24V - E-350
- 2012 - 2013 Holiday Rambler Aluma Lite Motorhome 23RB
- 2011 - 2011 Holiday Rambler Aluma Lite Motorhome 23RB - Triton
- 2005 - 2007 Winnebago Aspect Motorhome 23D
- 2007 - 2007 Winnebago Aspect Motorhome 26A
- 2008 - 2009 Holiday Rambler Atlantis Motorhome 121 - Triton
- 2008 - 2009 Holiday Rambler Augusta Motorhome 213 - Triton
- 2008 - 2008 Holiday Rambler Augusta Motorhome 214 - Triton
- 2008 - 2009 Holiday Rambler Augusta Motorhome 235S - Triton
- 2015 - 2015 Holiday Rambler Augusta Motorhome 23B
- 2010 - 2010 Holiday Rambler Augusta Motorhome 23RBS - Triton
- 2015 - 2015 Holiday Rambler Augusta Motorhome 25K - E-350
- 2012 - 2013 Holiday Rambler Augusta Motorhome 25PCS
- 2011 - 2011 Holiday Rambler Augusta Motorhome 25PCS - Triton
- 2000 - 2001 Coachmen Catalina Sport Motorhome 195RK
- 2007 - 2007 Winnebago Chalet Motorhome 22B
- 2008 - 2008 Winnebago Chalet Motorhome 24V
- 2008 - 2010 Four Winds Chateau Citation Motorhome 21BC - Ford
- 2011 - 2011 Thor Chateau Citation Motorhome 21BC - Ford
- 2010 - 2010 Four Winds Chateau Motorhome 19G
- 2008 - 2010 Four Winds Chateau Motorhome 21RB - Ford
- 2010 - 2010 Four Winds Chateau Motorhome 23A - Ford
- 2009 - 2009 Four Winds Chateau Motorhome 23A - Triton
- 2011 - 2012 Thor Chateau Motorhome 19G
- 2011 - 2011 Thor Chateau Motorhome 21RB - Ford
- 2013 - 2015 Thor Chateau Motorhome 22E - Ford
- 2011 - 2015 Thor Chateau Motorhome 23U - Ford See All Vehicle Fits
Video of SuperSprings Custom Suspension Stabilizer and Sway Control Kit
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Video Transcript for All About the SuperSprings Custom Suspension Stabilizer and Sway Control Kit
Speaker 1: Today we're going to be taking a look at the SuperSprings lines of custom suspension stabilizer and sway control kits. You'll want to use etrailer's fit guide to determine the correct kit for your vehicle. Here's what our SuperSprings are going to look like once we have them installed. Now these are going to give us the support we need whenever we're hauling a heavy load or towing a heavy trailer. Typically, whenever we're hauling something extremely heavy our suspension wants to flex a lot and our back end sags down. Well these are going to provide us the extra support by activating whenever our suspension flexes, the rollers on the end of our leaf spring are going to activate our helper spring and provide us that extra support.
But also still giving us a nice ride when we're not towing something heavy, because it's going to deactivate those springs and still have a nice comfortable ride.And since they are attached to the front and back of our factory leaf springs, it's also going to act like a sway bar and it's going to prevent our leaf springs from twisting. Giving us a lot more stability when we're driving down the road. The multiple notches in the end here are going to provide us with a little bit of customization, depending on how much support we need. If we need more or if we just have a little bit of spring fatigue in our truck, it'll give us that little bit of lift so whenever we're towing something we don't have quite as much sag.We have a water tank in the bed of our truck as a heavy load or to simulate the tongue weight of a heavy trailer or a fifth wheel. So as I take the truck through my test course, I can definitely tell that there's a load back there.
The engine doesn't seem to be straining that much, but the bumps are extremely harsh and I can definitely feel it resonating through the seat. When I come to the slalom course and I'm going through the turns it definitely has a lot of body roll and I just generally feel like I need to slow down because it feels like it's leaning a lot and it's not responding quickly enough to the turns.The SuperSprings installed and I have the same load back there. When I'm driving through our course I can immediately tell a difference. The bumps aren't as harsh because the truck isn't sagging down as much and there's a little bit more support back there. But really where I tell a big difference is through the slalom course.
It definitely feels way more stable and even taking the turns going in and out, it just feels like it really wants to stick to the ground a lot better and just generally wants to go faster.Compared to airbags, these are a maintenance free option with no tubes to run or air pressure to maintain. Similar to airbags you can customize the level of support provided. Unlike airbags however you do this during the installation and set it one time rather than on the fly adjustability you get with airbags.And that completes our look at the SuperSprings line of custom suspension stabilizer and sway control kits.
Ratings & Reviews
4.6
314 reviews
by:
Yoshimar
11/19/2023
Perfecto
by:
Allan
10/25/2026
2016
Nissan
NV 1500
Before these, my van "slouched" in the back and would really do so when trailer was hooked up. With a constant load and trailer, needed some help back there. These "add-on-springs" greatly helped out, raised height of body off of axle. Got rid of "slouch".
After mechanic put these on, said springs have a lot of tension on them, so much that ratchet-straps were needed to help out in installation.
The ride down the road is great, just a "tad" stiffer, but not overwhelming noticeable.
Bumps-well I got these, Summo (bump-stops),and new shocks -all for back. Ride is so much better!
Thanks E-trailer for furnishing the bulk of parts needed for all this, great products.
After mechanic put these on, said springs have a lot of tension on them, so much that ratchet-straps were needed to help out in installation.
The ride down the road is great, just a "tad" stiffer, but not overwhelming noticeable.
Bumps-well I got these, Summo (bump-stops),and new shocks -all for back. Ride is so much better!
Thanks E-trailer for furnishing the bulk of parts needed for all this, great products.
by:
Joseph
11/30/2025
This was a great addition to the suspension of my 2021 Ford E350 Class C RV. The rear springs were at almost max load. This raised the chassis at the rear axle almost 2-inches. This is a heavy duty spring and I had to fabricate a tool to compress the spring.
by:
John Or Andra
09/02/2025
Fit great on my 2025 Ram. I makes a big difference pull my 14000lb 5th wheel. Highly recommend these for any heavy loads. I have put these on 3 other trucks and they are maintenance free. You don't need to worry about the load you are hauling.
John
9/3/2026
The product works great after a year. I highly recommend the super springs for any heavy loads. After they are installed you never need to worry about the load.
Jerry B.
9/3/2026
@John That's awesome! What kind of truck did you put yours on?
by:
Don
09/16/2026
Worked just like SuperSpring said, they Stabilized the load and reduced the sag with a very heavy Truck Camper also the ride without the camper is not horrible just a little stiffer.
by:
David
06/13/2026
While use the middle setting it only gave it a slight lift with a minimal unloaded bounce. Usually never overload the trucks maximum capacity but needed to for a short distance and with approximately 1300 pounds in the bed, the truck didn't squat at all.
by:
Chris
10/16/2026
these will hold up with the added weight of the screw compressor and welder in bed
by:
Bruce
09/02/2026
Exactly what I needed and what I wanted very fast shipping thanks E trailer
by:
Peter
07/18/2026
dodge
Ram Pickup
Fast delivery, free shipping, the springs went on pretty easy, had some problems with install due to my vehicles configuration, Travato59K,not the springs. This was a 2024 RAM Promaster3500, raised it up 1.75” on the lower setting. Noticeable help with sway problem.
by:
Bob
04/22/2026
2026
GMC
Sierra 1500
The shackles on each end were too narrow to clear the spring clips so locating them was harder than need be. The instructions had a mistake, locating the front shackle incorrectly. Installed as they are. Improved ride a lot. Glad I got them.
Gwendolyn Y.
4/23/2026
Thanks for your feedback, Bob! We’re glad to hear the shackles made a noticeable improvement in your ride quality. We appreciate you pointing out the fitment challenge and the issue with the instructions, I'll pass it on to SuperSprings.
by:
Javier G
10/16/2024
2023
Ford
E-Series Cutaway
This product did exactly what I needed. Lift the RV up to unloaded height. I have not exceeded the 12500 GCWR but the rear end was dragging like it was severely overloaded. It was a very tight fit because the mud flap framing and gas lines were almost in the way. An entire day later with a couple of clamps and sore wrists at max setting fixed the sag perfectly! I wish I had before and after pictures. I can almost fit my head in the wheel where I could not get my arm in before.
Javier G.
10/21/2025
They are working out fantastically! Now we dont bottom out and damage the sewer dump. Weve been all a long road trips and nothing is bothering us now in regards to suspension.
by:
T
03/05/2025
Without towing, the truck seems to ride a little smoother. The real test will come when I hook up my fifth wheel. Very simple to install.
T
3/6/2026
Works great towing and seems to help with some sag and roll. I use them along with airbags so towing my fifth wheel is now worry free.
by:
Gerry T
08/17/2025
2017
Thor
Compass Motorhome
Unbelievable! Why didn’t I do this sooner? I’ve never seen daylight between my tires. Gaines two inches and rides soooo much better.
by:
Rich
08/20/2020
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 axel.at rear of vehicle. I like this system better than air shocks as there is no adjustment after installation. I would purchase again.
by:
Philip
11/10/2025
Nissan
Leaf
I bought these as part of my suspension modifications . I had them installed on my Ford F350 SB . I have an Arctic Fox 865 truck camper. It’s a heavy camper so to minimize sag and sway I installed Timbren bump stops, a hellwig bigwig sway bar,Torque lift stable loads. That improved things quite a bit. I installed these super springs last ,they further improved sway and improved the overall stability and ride quality.
I definitely feel these were worth purchasing. I could not decompress the existing leaf springs enough to install these myself so had them professionally installed.
I would recommend them for hauling a truck camper.
I definitely feel these were worth purchasing. I could not decompress the existing leaf springs enough to install these myself so had them professionally installed.
I would recommend them for hauling a truck camper.
by:
Florida
11/06/2025
Nissan
Leaf
Added these to my Mercedes air stream 19x class b van that already has 2 leaf springs. Had swaying issues at 60MPH and up. These put a stop to it right away and kept from sagging in the rear when loaded up with all our gear and water tank full. I have them on the mid setting. My van is 4wd and already lifted so didn’t raise it more than 1/2in. Still has a smooth ride and no big jolts like air bags or sumo springs.
I bought these a year ago so not sure if anything has changed Bad thing is they are slightly too long, Just enough to touch the wheel well and rub the under coating off. If you’re going to install yourself, I found a good you tube install. The U-bolts for install are too short. Need 2 forged C-clamps.
These are a 100% buy, don’t mess with air bags or sumos. These adjust themselves with load or no load.
I bought these a year ago so not sure if anything has changed Bad thing is they are slightly too long, Just enough to touch the wheel well and rub the under coating off. If you’re going to install yourself, I found a good you tube install. The U-bolts for install are too short. Need 2 forged C-clamps.
These are a 100% buy, don’t mess with air bags or sumos. These adjust themselves with load or no load.
by:
Mike
03/19/2023
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.
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.
by:
Greg
07/09/2021
2019
Ford
F-250 Super Duty
This was by far the easiest mod I have made to my 2019 Ford Super Duty King Ranch! Only took 45 minutes start to finish. Didn't even take the wheels off. Took some pressure off of the springs by lifting the rear end a little using the trailer hitch. Used the bottom holes on both ends and only raised the rear of the body 1 inch. Great product!
by:
Michael
11/17/2025
I have the Yakima EXO Swing Away Storage System w/ 2 Enclosed Cargo Carriers - 2" Hitches on my 2025 Airstream Interstate. They were causing the van to sag. The Springs went on Fairley easy and provided the lift I needed.
by:
Andre
03/21/2026
Nissan
Leaf
These leaf springs works great !! More stable my van but I would like that it brings up an inch !!! Great buy
by:
Lamar - 2020 Ford F250 with SSA22
04/20/2024
2020
Ford
F-250 Super Duty
Installing these on a 2020 F250 was easier than I thought it would be. I was able to get the springs on whit the center piece and the front shackle bolted without jacking up the truck. I had to jack the frame up a few inches on each side to get the back shackle bolt through. I put the shackle bolts through the bottom holes since I only need the extra support when I tow. I recommend air / power tools for the shackle nuts and it doesn’t hurt using them for the center bracket u bolts. They are lock nuts and they have a long way to run on for each bolt. I did have to bend my parking brake cable hangar out a bit for one of the shackle bolts to clear the cable. The truck seems to sit a little higher in the back. Maybe an inch or so. The ride empty seemed the same except it felt like it didn’t roll quite as much when turning. Rolling over a lip at the end of our driveway the extra stiffness was noticeable, however. I won’t know how well they really work until I get my fifth wheel hooked up.
by:
Ted P
11/13/2013
2013
Toyota
Tundra
2013 Toyota Tundra 4x4. Installation went well in my garage with a medium sized C-Clamp. The ride feels that same as stock. Lifted the rear 1.5" which helped off set the 2.5" lift in the front from Fox 2.0 shocks. I have not hauled a load yet.
by:
Mark
10/28/2026
2004
Ford
F-250 Super Duty
Fits great and leveled the rear with a camper
by:
Gregg
04/24/2020
Product worked as described. Shipping was quick (etrailer used "air" to my state, then on UPS truck)
Easy to install, not sure why they included 2 sets of polyurethane blocks (only one set fit my truck)
Don't notice any ride difference when set at lowest setting. Raised truck approximately 3/4". East to readjust for more preload if needed.
Combined these Super Springs with Timbren load handlers. So far so good.
Great improvement over stock while maintaining ride quality.
Easy to install, not sure why they included 2 sets of polyurethane blocks (only one set fit my truck)
Don't notice any ride difference when set at lowest setting. Raised truck approximately 3/4". East to readjust for more preload if needed.
Combined these Super Springs with Timbren load handlers. So far so good.
Great improvement over stock while maintaining ride quality.
by:
Timothy
09/24/2025
I installed the springs in a little over an hour but have yet to put our 15,500 lb 5th wheel RV on the truck. The pin weight is around 2,800 lbs when she is fully loaded, so we will see if these help us with the sway and porposing, also the side weight when starting into a curve.
Mike L.
9/24/2025
Once you get the chance to tow your 5th wheel, please let us know how you like them!
25
314
true
Show More Reviews
See what our Experts say about this SuperSprings Intl Vehicle Suspension
- What Rear Suspension Support Should I Get for My 1992 Ford E-350 7.5L Chassis Motorhome?Hello Jake, Thanks for writing in. I double checked with SuperSprings, and there are not any SumoSprings available for the 1992 Ford E-350. I see that you already ordered exactly what I was going to recommend, the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA8. The # SSA8 is a great option for your E-350. It installs above your existing rear leaf springs and gives you 1,500 lbs of additional load-leveling support to help reduce rear-end sag and sway. It is also...
view full answer... - Will Adding Helper Springs Take Care of Worn Suspension on a 2003 Ford E-350 RV CutawayHelper springs and any suspension enhancement product such as # SSA8 are meant to be installed on a vehicle with a factory suspension system that is in good working condition. It sounds like the suspension needs to be replaced on your 2003 Ford E-350 so you would not want to install suspension enhancement until it is replaced. Once it is replaced then adding suspension enhancement will help extend the life of the stock suspension so that you do not run into this issue again. For your RV...
view full answer...
Do you have a question about this Vehicle Suspension?
Info for this part was:
Video by:
Andrew K
Written by:
Tricia G
Updated by:
Mary K
Updated by:
Wilson B
Updated by:
Alex H
Updated by:
Noah M
Video Edited:
Jonathan Y
Installed by:
Robert C
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Nick S.
12/1/2025
That is great to hear! I am glad this addition has worked well for your setup. What RV do you have that you added this too?