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Heavy trailers, campers, or bed loads can make the rear end sag and throw off handling. The SuperSprings Custom Suspension Stabilizer and Sway Control Kit adds up to 1,900 lbs of support to your rear leaf springs to keep things level and stable under load. It lifts your vehicle when carrying weight and prevents bottoming out without needing air pressure adjustments or extra maintenance.
When wind, passing trucks, or sharp curves push your rig around, these helper springs act like a sway bar to cut body roll by up to 30 percent. The rollers on each end engage automatically as your factory springs flex, helping keep both sides planted and reducing sway from shifting loads or gusts on the highway.
The kit installs easily with no drilling required. It bolts right above your existing leaf springs using the included mounting hardware and extended-length U-bolts for spring packs greater than 2-3/4" tall. Everything fits cleanly so you can set it up without needing extra parts or special tools.
Unlike air bag systems that need constant checking, these helper leaf springs work on their own. They automatically adjust as your load changes—stiffening under weight and relaxing when unloaded—so your ride stays dependable whether you’re towing a trailer or driving empty around town.
You can dial in how much support you want using different shackle bolt positions. For heavier or constant loads, use the upper holes for more lift and firmness. To keep close to factory ride height when empty, use the lower holes. Mix both ends for a balanced setup that blends comfort with support.
Alternate Instructions
Ratings & Reviews
Mike L.
2/8/2019
If you look at page 4 of the instructions which Ive linked for you, you can see photos showing a single leaf spring set up just like whats shown in the photos you provided thanks for the photos!. Im guessing that page was not included in your instructions for some reason.
Helpful Links
Timothy
2/9/2020
Springs are working wonderful after I figured out the install,. The initial problem was all my fault for being a man and not really reading the instructions haha. All is well
Brooke M.
6/11/2025
That's awesome, Douglas! Great to know these have been the solution you were looking for. The Timbrens are known to be pretty stout for sure. I can totally see how these would have the right amount of give needed to support the camper and have a smooth ride :) Have you taken out the truck and camper recently?
Conrad
8/19/2021
After about one year, these are still working great. I typically use my truck for pulling my 5th wheel. But - even when empty, you dont really feel anything different. When the camper is on, it sure levels the truck and camper out perfectly, giving you a great ride.
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.
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 .
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.
Info for this part was:
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Howard
11/9/2020
One Year later still no sag.