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When the weight piles on, your truck shouldn’t squat or sag. The SuperSprings Custom Suspension Stabilizer and Sway-Control Kit adds up to 4,600 lbs of rear suspension support by mounting directly above your factory leaf springs. The helper springs automatically engage as the load increases, lifting the rear end to maintain level ride height and steering control. No air lines or adjustments—just bolt them on and let the springs do the work whenever you’re towing or hauling.
Crosswinds, passing semis, and weight shifts in a corner can make your rig feel like it’s fighting back. These helper springs act like built-in sway bars to keep your rear suspension from twisting, reducing body roll by up to 30 percent. By reinforcing the factory leafs, they make the vehicle feel more planted when towing or traveling over uneven roads, keeping you steady and in control when it matters most.
Every load sits a little different, and these springs let you match your setup to what you’re carrying. The adjustable shackles offer several installation options—choose more support and ride height for constant heavy loads or a lower setting to keep the original ride quality when unloaded. There’s even a middle setting that balances comfort, support, and height for mixed use.
Adding serious load support doesn’t have to be complicated. This kit bolts right above your existing leaf springs with no drilling required. For models with springs mounted above the axle, dense polyurethane spring pads are included to prevent shifting between the SuperSprings and factory springs. It’s a straightforward way to reinforce your suspension without adding maintenance or air systems to monitor.
Once installed, these helper springs take care of themselves. There are no airlines, compressors, or valves to adjust—just solid mechanical support that automatically reacts when your suspension flexes under load. You’ll get better stability, longer suspension life, and consistent performance trip after trip without having to crawl under the truck to make changes.
Customer Satisfaction Score:
94% were satisfied with this product
6% of customers were not satisfied
Ratings & Reviews
Daniel H.
6/27/2025
The springs are working expected the truck does ride much better with trailer attached, but much stiffer ride when running around without the trailer.
Chris R.
6/27/2025
Kate F.
2/25/2026
I would like to know more Ryan. What is your year, make, and model? Did you go through the fitguide? If it is not a confirmed fit then the list of vehicles that it does fit will appear: 2010–2027 Ram 3500 Cab and Chassis (2WD & 4WD); 2010–2027 Ram 3500 Pickup (2WD & 4WD); 2010–2025 Ram 4500 (2WD & 4WD); 2010–2027 Ram 5500 (2WD & 4WD); 2009–2027 Chevrolet Express 4500; 2008–2010 Ford F-350 Super Duty (2WD & 4WD); 2011–2016 Ford F-450 Super Duty (4WD); 2003–2007 Dodge Ram 2500 Pickup; 2007–2014 Dodge Ram 3500 Cab and Chassis; 2003–2014 Dodge Ram 3500 Pickup; 2008–2014 Dodge Ram 4500 Cab and Chassis; 2008–2014 Dodge Ram 5500 Cab and Chassis; 2009–2025 GMC Savana 4500; 2001–2013 GMC Sierra 3500 (Cab and Chassis & Pickup); 2014–2026 GMC Sierra 3500 Cab and Chassis (2WD & 4WD); 2014–2026 GMC Sierra 3500 Pickup (2WD & 4WD); 2007 GMC Sierra Classic 3500 (Cab and Chassis & Pickup); 2007 GMC Sierra New Body 3500 (Cab and Chassis & Pickup); 2001–2013 Chevrolet Silverado 3500 (Cab and Chassis & Pickup); 2014–2026 Chevrolet Silverado 3500 Cab and Chassis (2WD & 4WD); 2014–2026 Chevrolet Silverado 3500 Pickup (2WD & 4WD); 2007 Chevrolet Silverado Classic 3500 (Cab and Chassis & Pickup); 2007 Chevrolet Silverado New Body 3500 (Cab and Chassis & Pickup). I am trying to find out more information because we want our information very accurate.
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?
Nick S.
12/2/2025
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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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.