To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.
Heavy trailers, campers, or bed loads can make the rear of your truck sag, throwing off steering and braking. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds up to 3,400 lbs of extra support by mounting above your factory leaf springs. The helper springs automatically engage when weight is applied, lifting the rear and keeping your truck level so you don’t bottom out or lose control under load.
Big rigs passing or gusty winds can push your truck around when it’s loaded. These helper springs act like a sway bar by reinforcing the factory springs and keeping them from twisting. That added stiffness cuts body roll and reduces sway by up to 30 percent, keeping your setup stable whether you’re cornering through mountain roads or rolling down windy highways with a trailer in tow.
There’s no tubing or air to monitor—these springs adjust automatically as the load changes. Rollers at each end activate when the factory springs flex and deactivate when unloaded, giving you support only when needed. That means a smoother ride with no crawling under the truck to add air or mess with valves.
Not every load is the same, so this kit lets you choose how much lift or firmness you want. The shackles have multiple bolt positions that let you set for constant heavy loads, maintain original ride height, or find a balance between support and comfort. It’s easy to dial in the setup that matches how you actually use your truck day to day.
Installing the system is straightforward—just bolt it on above the existing springs using the included hardware. Poly spring pads keep everything seated securely for models that need them, and once installed there’s no maintenance required. The extra support helps extend the life of your brakes, tires, and factory suspension while keeping your truck ready for whatever load comes next.
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
Ratings & Reviews
Brooke M.
11/22/2024
Glad to hear we got you on your way again! Thanks for taking the time to leave a review! We are here for you if anything else comes up :)
Charles
2/23/2026
I could not be happier with this product,
Do you have a question about this Vehicle Suspension?
Info for this part was:
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Troy
12/6/2020
Installed it about a year ago. The springs are working out great. I don’t have the sagging of the rear end like I use to when towing. I have had to replace the pads once, but besides that, it’s a awesome system.