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When the bed is packed or the trailer is on the hitch, rear-end sag can throw off your ride height and steering feel. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds up to 3,000 lbs of rear suspension support, reducing sag and keeping your truck level under heavy loads. These helper springs mount above the factory leaf springs, taking strain off your stock setup and helping maintain proper stance and braking balance when towing or hauling.
Strong crosswinds, curves, and uneven loads can make a truck sway or roll more than you’d like. This kit works like a sway bar by reinforcing your factory springs to reduce body roll by up to 30 percent. The SuperSprings engage through rollers that activate under load, adding stiffness only when you need it. That means a more stable feel when cornering, passing big rigs, or driving in gusty conditions—without sacrificing unloaded ride comfort.
There’s no air pressure to monitor or tubing to leak. The SuperSprings system adjusts automatically to your payload—just bolt it on and go. As load increases, the spring tension rises to balance out weight distribution; when unloaded, the rollers deactivate for normal ride quality. It’s a no-drama way to keep your suspension working right without extra upkeep or adjustments.
Every truck carries weight a little differently. That’s why this kit gives you multiple shackle mounting options to tune support and height. Use the upper bolt holes for maximum lift and stiffness when carrying constant heavy loads or dealing with older springs, or use the lower bolt holes to maintain a near-factory ride when empty. A mixed setup using one upper and one lower hole offers a balanced middle ground between support and comfort.
The kit includes extended-length U-bolts for spring packs over 2-3/4" tall and a mounting kit designed for factory springs that sit above the axle. The hardware keeps everything secure while allowing the shackles to pivot smoothly as weight transfers to the helper springs. With its bolt-on design and no drilling required, you get strong rear suspension reinforcement that installs cleanly and works quietly under load—ready for towing, hauling, or everyday work use.
Alternate Instructions
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
Ratings & Reviews
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.
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.
Awesome! easy to install
Makes big difference when towing 6000lb loads
My sales rep was professional and know exactly what I needed. I also needed fast delivery of the auto parts I ordered and they arrived right on time.
Added these springs to my 2500 Silverado to prepare for a slide in camper. They made quite a difference. I did it myself, but two people would be easier. The ride is naturally a little stiffer when empty, but that's the trade off.
This was installed on a Chevy 1 ton with camper works great for helping sway
and suspension
Exceeded all expectations
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.
Well first of all if I knew I wouldn't get the product after paying 900.00 for it I wouldn't bought it. Item gets lost by fedex and I get the runaround from u people......I will never buy anything else from you guys and will leave bad feed back everywhere. LONG AS YOU GET YOUR MONEY YOU DONT CARE ABOUT THE CUSTOMER!!!!!!!!!
I used the SuperSprings to help support my Slide In Camper for my 2500 Chevy. They support good. I have Timbren installed also, but were bottomed out. After adding the SuperSprings with the Timbren the camper is supported good. The truck sits and rides level
Packages arrived on time, everything was there, installation went good, I removed the rear tires to make it easier, picked the rear of the truck up by 1 3/4 inches, have not hooked up 5 th wheel yet, we will see if it helps with the bottoming out .
Larry P.
10/3/2022
They work great, they improved the rear suspension so there is no more bottoming out when I pull the 5 wheel Rv .
We purchased the product and it arrived on time, scheduled the mechanic to install the springs at the mechanics shop on step 1 of the instructions that we needed a special bolt kit for an additional $120.00 this was very miss leading. We ordered the additional bolt kit should be delivered on 11/18/24 we will see what is next. It would have been nice to have a pop up or some type of information warning us of the additional bolt kit when ordering the product stating we needed to purchase and additional kit. Im not to impressed with the purchasing part of the SuperSprings experience, hopefully they will be a superior product so I can forget about the bad experience. We will see
Victoria H.
11/11/2024
Hi Chris, there should've been a hardware kit for suspensions with leaf springs that sit above the axle. Please let me know if this is the hardware kit that was missing, and I can help you get this resolved.
Great price fast shipper easy to work with on ordering
Works excellent for my application. Noticed a difference in the vehicle stance and handling immediately. Kit came with parts not needed that were for other vehicle axle types and not enough 1/2” washers is the only reason for not giving 5 stars.
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Mike L.
10/1/2026
UPS is currently doing an investigation, once they figure out what's going on we'll get you an update. I'm very sorry for the delay.