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When you’ve got a heavy trailer, camper, or bed load weighing you down, these helper leaf springs give your rear suspension real muscle. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds 4,400 lbs of extra support by mounting right above your factory leaf springs. They keep your ride level, prevent sagging, and help your suspension handle the weight without bottoming out. The result is steadier steering and braking when you’re towing or hauling something serious.
Crosswinds, passing semis, and sharp corners can make a loaded vehicle feel loose. These springs act like sway bars by keeping your OEM leaf springs from twisting under stress. The design reduces sway by up to 30 percent, so you stay more stable through curves and gusty highway conditions. It makes a big difference when wind or weight shifts try to move you around—you feel planted and in control instead of fighting the wheel.
You don’t need to crawl under the truck to adjust anything or deal with airlines and compressors. These SuperSprings bolt directly on top of your factory springs with no drilling required. Once installed, they automatically engage when the load demands it. That means no air pressure checks or maintenance—just a solid mechanical system that works whenever it’s needed and stays out of the way when it’s not.
By reinforcing your existing springs and spreading out the cargo weight through the frame points built for heavy loads, these helper springs take stress off your factory suspension. That helps extend the life of your brakes, tires, and other parts while keeping traction and ride comfort better than rubber or polyurethane bumpers. It’s a simple bolt-on system that adds real durability for anyone who regularly tows or hauls.
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hello everybody. This is Jeff at etrailer.com. Today we gonna take a look at the super springs custom suspension stabilizer and sway control kit. Now this is a custom fit part. It is designed to fit the 2019 and newer Chevrolet Silverado and GMC Sierra 4,500, 5,500 and 6500 trucks, and also the International CV Series trucks and on a custom fit part like this, I always like to recommend for you to go to our website, use the fit guide put in your year and model of vehicle and it'll show if this'll work for your application. Now, these are additional help relief springs, that'll add support and sway control to your existing OEM suspension.
They'll reinforce your vehicles rear suspension, with these extra leaf Springs that'll prevent sagging and help reduce sway by up to 30%. They work like sway bars to stabilize your OEM springs and keep them from twisting. They'll help compensate for windy conditions, wind turbulence from big rigs and even weight shifts from cornering. This'll lift your vehicle when you're carrying a heavy load and prevent any bottoming out and they do install very easily. They just basically bolt on above your existing factory springs with no drilling required.
Placing these leaf springs above your factory springs will help keep the OEM springs from twisting. So the super springs will act like a sway bar, reducing the body roll that makes driving more difficult and dangerous, and it requires no maintenance, there's no tubing or air pressure to monitor or adjust like air springs. These help release springs will respond automatically to the load you carry. So there's no need to crawl under your truck to adjust some. These do help extend the life of your brakes, your tires, and your factory suspension.
And they are made in the USA. Few specs on this, the weight capacity is 4,400 pounds. Now, one thing to remember that these super springs will not increase your vehicle's weight carrying capacity. Does come with everything shown here, even a nice set of instructions, that'll show you and describe how these install. But that should do it for the review on the super springs custom suspension stabilizer and sway control kit..
Ratings & Reviews
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
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.
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.
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.
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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?