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When you’re towing a trailer or hauling heavy gear, nothing feels worse than the back end sagging and the steering getting light. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds up to 3,400 lbs of load support by bolting above your factory leaf springs. It lifts and levels your truck under load, preventing bottoming out and keeping braking and steering steady when you’re packed full or pulling weight up a grade.
Crosswinds, passing semis, and sharp corners can all make your ride feel loose. These helper leaf springs work like sway bars to keep your factory springs from twisting, reducing sway by up to 30 percent. The design stabilizes your suspension so your truck stays planted and predictable, even when the load shifts or the road gets bumpy.
Each spring has rollers on both ends that activate automatically as your factory springs flex under load and then deactivate when you’re unloaded. That means you get the extra support only when it’s needed—no adjustments, no maintenance, no air pressure to monitor. The system balances comfort and control whether you’re towing, carrying cargo, or driving empty.
The included shackles offer multiple mounting options so you can tune support and ride height for your setup. Choose an upper bolt hole for maximum lift under constant heavy loads or to help older springs, use the lower hole to keep factory ride feel when unloaded, or pick a mixed setting that balances both. It’s a simple bolt-on install with no drilling required, making it easy to dial in performance that fits how you use your truck.
Dense polyurethane spring pads prevent shifting on models where the factory springs sit above the axle, keeping everything secure through rough use. With no tubing or air lines to leak or maintain, these helper springs are a low-cost way to extend the life of your brakes, tires, and suspension while keeping your truck level and stable every time you load up.
Customer Satisfaction Score:
91% were satisfied with this product
9% of customers were not satisfied
Ratings & Reviews
You should inform customers about special tools needed to preform install. Not on easy install as stated in video
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.
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.
These leaf springs works great !! More stable my van but I would like that it brings up an inch !!! Great buy
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.
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.
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.
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.
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.
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.
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.
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.
Exactly what I needed and what I wanted very fast shipping thanks E trailer
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.
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.
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.
I bought this product for my 2001 F250 that I use to haul a 24' gooseneck horse trailer typically loaded with about 3000-4000 lbs of cargo.
My truck was squatting and I was experiencing sway, expecially on the interstate when passing tractor trailers.
The super springs greatly improved my truck's suspension and performance when hauling. I would highly recommend this product.
PARTS are Excellent, and exactly as described. This was a great replacement kit. We are satisfied with our etrailer experiences.
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Condition: Installed
Notes: The item was partly installed for a test fit. Otherwise, new and unused. All hardware is included.
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