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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:
90% were satisfied with this product
10% of customers were not satisfied
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.
Do you have a question about this Vehicle Suspension?
Condition: Installed
Notes: The item was partly installed for a test fit. Otherwise, new and unused. All hardware is included.
Condition: Missing Parts
Notes: Item is the 2 leaf springs only. It is missing and does not include the spring pads, u-bolts, lock down clamp or flanges nuts.
Info for this part was:
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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?