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When the weight piles on, your truck shouldn’t squat or sag. The SuperSprings Custom Suspension Stabilizer and Sway-Control Kit adds up to 4,600 lbs of rear suspension support by mounting directly above your factory leaf springs. The helper springs automatically engage as the load increases, lifting the rear end to maintain level ride height and steering control. No air lines or adjustments—just bolt them on and let the springs do the work whenever you’re towing or hauling.
Crosswinds, passing semis, and weight shifts in a corner can make your rig feel like it’s fighting back. These helper springs act like built-in sway bars to keep your rear suspension from twisting, reducing body roll by up to 30 percent. By reinforcing the factory leafs, they make the vehicle feel more planted when towing or traveling over uneven roads, keeping you steady and in control when it matters most.
Every load sits a little different, and these springs let you match your setup to what you’re carrying. The adjustable shackles offer several installation options—choose more support and ride height for constant heavy loads or a lower setting to keep the original ride quality when unloaded. There’s even a middle setting that balances comfort, support, and height for mixed use.
Adding serious load support doesn’t have to be complicated. This kit bolts right above your existing leaf springs with no drilling required. For models with springs mounted above the axle, dense polyurethane spring pads are included to prevent shifting between the SuperSprings and factory springs. It’s a straightforward way to reinforce your suspension without adding maintenance or air systems to monitor.
Once installed, these helper springs take care of themselves. There are no airlines, compressors, or valves to adjust—just solid mechanical support that automatically reacts when your suspension flexes under load. You’ll get better stability, longer suspension life, and consistent performance trip after trip without having to crawl under the truck to make changes.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
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.
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 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.
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.
Product 50% arrived on time the other 50% two days later.
I got two springs for the driver side, nothing for the lpassenger side ??? The sticker said front direction and this side OUT.
I ended replacing the directions of the installed bolts so they will noy touch the frame of the truck.
I could not find any instructions in the package, after the instelation was all done, I found a pice of paper folded very small in the cardboard that went to the trash.
The GOOD PART after all was done, the system preformed very nice.
Super awesome, fairly easy install, had a huge difference in hauling and handling. Thank you for your product
Very poor description on what vehicles this works on.
Well overall it was a pretty easy install. They did help the squat when hooked to our 5th wheel. The truck handles great. Only this is when not loaded they bang a bit. It was a fair investment
Daniel H.
6/27/2025
The springs are working expected the truck does ride much better with trailer attached, but much stiffer ride when running around without the trailer.
Chris R.
6/27/2025
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
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Kate F.
2/25/2026
I would like to know more Ryan. What is your year, make, and model? Did you go through the fitguide? If it is not a confirmed fit then the list of vehicles that it does fit will appear: 2010–2027 Ram 3500 Cab and Chassis (2WD & 4WD); 2010–2027 Ram 3500 Pickup (2WD & 4WD); 2010–2025 Ram 4500 (2WD & 4WD); 2010–2027 Ram 5500 (2WD & 4WD); 2009–2027 Chevrolet Express 4500; 2008–2010 Ford F-350 Super Duty (2WD & 4WD); 2011–2016 Ford F-450 Super Duty (4WD); 2003–2007 Dodge Ram 2500 Pickup; 2007–2014 Dodge Ram 3500 Cab and Chassis; 2003–2014 Dodge Ram 3500 Pickup; 2008–2014 Dodge Ram 4500 Cab and Chassis; 2008–2014 Dodge Ram 5500 Cab and Chassis; 2009–2025 GMC Savana 4500; 2001–2013 GMC Sierra 3500 (Cab and Chassis & Pickup); 2014–2026 GMC Sierra 3500 Cab and Chassis (2WD & 4WD); 2014–2026 GMC Sierra 3500 Pickup (2WD & 4WD); 2007 GMC Sierra Classic 3500 (Cab and Chassis & Pickup); 2007 GMC Sierra New Body 3500 (Cab and Chassis & Pickup); 2001–2013 Chevrolet Silverado 3500 (Cab and Chassis & Pickup); 2014–2026 Chevrolet Silverado 3500 Cab and Chassis (2WD & 4WD); 2014–2026 Chevrolet Silverado 3500 Pickup (2WD & 4WD); 2007 Chevrolet Silverado Classic 3500 (Cab and Chassis & Pickup); 2007 Chevrolet Silverado New Body 3500 (Cab and Chassis & Pickup). I am trying to find out more information because we want our information very accurate.