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When your truck is loaded down or pulling serious weight, body roll can make it feel like the back end has a mind of its own. This adjustable rear anti-sway bar lets you tune stiffness with three settings to dial in the perfect balance of comfort and control. The 1-5/16" solid 4140 chromoly steel bar ties the frame and axle together to cut down on side-to-side movement, giving you flatter cornering, steadier tracking, and a level ride even when the road or load isn’t.
Crosswinds and passing semis shouldn’t make you grip the wheel like you’re hanging on for dear life. This setup reduces sway from shifting cargo or gusty conditions, so the truck stays planted and easy to manage. The result is smoother lane control, less steering correction, and a more relaxed drive no matter how long the haul.
This isn’t a lightweight add-on. The bar is built from thick, 4140 chromoly steel and finished in a silver vein hammer-tone powder coat that resists corrosion. Brackets and end links get their own black powder coat for extra protection. The polyurethane bushings hold up against oil, gasoline, and ozone, so they don’t squish out or wear down quickly—keeping the system tight and responsive through years of use.
No drilling or fabricating needed here. The sway bar bolts on with the included zinc-plated mounting hardware and comes with bushing lubricant to make setup straightforward. When it’s time for maintenance, just remove the bushing brackets and apply a premium heavy-duty NLGI #2 lithium or synthetic grease—simple as that.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
DO not order this! So many reviews of it coming with the package destroyed and hardware missing. I am STILL waiting for an answer on when my hardware will arrive and no one seems to care.
I expected the truck to ride stiffer. It doesn't. It is very snappy when correcting or recovering. I enjoy the ride. The installation instructions were very good.The only issue was with the clevis mounting bracket instructions. I called Hellwig and their support staff is incredible. I installed it by myself in my driveway. It's not an easy install, but it's not extremely difficult. It took me 2 1/2 hours including the call to Hellwig.
My truck was a little different from the instructions so I called customer support and they knew exactly what I needed to do. The fit was perfect
Thanks etrailer!
Installed on my 2022 F250 Tremor. Removed almost all of the excessive sway while hauling my cab over. Installation instructions are very clear and easy to follow. Installed in my driveway with basic hand tools in about 1.5 hours. By myself.
Went on smooth on my 2024 F250 6.7HO. Now the ride is more stable. I installed Sumo springs in the front also. A big difference in stability now. Rides a little firmer but no sway.
It took me maybe an hour and a half to install and adjust. No more side-to-side sway when passing big rigs or encountering them from the other direction. Really makes for a comfortable, more relaxed driving experience. I would definitely add this to any truck hauling a slide in camper or hauling a heavy load.
I had a great experience with etrailer. Got my sway bar delivered proply but when it was delivered to my house the box was wide open. Luckily all parts were there. It was no fault with etrailer, just with all the ups handling.
I just installed this on a Ram 3500 drw. First, go through all of the piece to both familiarize and see if all are there. A couple of important bushings were missing in mine, but Hellwig sent them to me very quickly. A parts list would have been nice. The fit on some of the pieces can be challenging, and my U-bolts were shorter than they should have been. It is what it is, designed for a truck that wasn't necessarily designed to have one, and the installation is consistent with that.
Works fine. Broke off a bolt during installation of one of the lower brackets. The Ford factory lock nuts grip extremely tightly making installing the Hellwig bolts difficult.
The geometry could be better. Not in love with how low the bar hangs in the rear when the truck is not loaded. Maybe if I ever need to land the truck on an aircraft carrier it will come in handy.
Removal of the old sway bar was more difficult than installing this Hellwig Big Wig Assy. Thank you Ford for no access to the nut between the frame and fuel tank. Everything went together smoothly. Delivery from etrailer was on time as promised.
My only criticism of the product was that the instructions were excellent (not so with the pictures provided) right up to the attachment of the adjustable arms to the Big Wig bar. What are the effects to the ride of the truck if you go with which hole. How long or short should the adjustable arms be?
The ride of my 3/4 ton truck has changed drastically.. Rock solid ride, semi trucks no longer toss me around when they go by, no longer do I feel like the truck will roll over when I corner. I carry a 2000 pound camper in the bed of this truck.
So happy to receive this item after the first box showed up empty with UPS! This box can in open but all utensils I believe were still in box thank goodness. UPS is not five star but this company is especially Paula who handled our order. Made her aware of the UPS alert that box was empty and she had a new shipment to us within hours and it still arrived the day before the installation appointment! This is the best company and will order from then again and again when we need items. Why??? Because the customer service is OUTSTANDING! Thank you!!!!!
I purchased the Big Wig sway bar set, front and rear (1-5/16" diameter) for my 2020 F350 after considering alternatives (Timbren, RAS). I am very happy with this new setup. Together the two anti-sway bars eliminated several handling issues I worked to resolve over two years of replacing worn components. My truck has over 205,000 miles and now handles better than new. The larger front sway bar from Hellwig and new bushings eliminated bump-steer and most of the slack in my steering. I previously replaced the end-links, all of the ball joints and tie-rod ends, shocks and steering stabilizer. Each made improvement tightening the steering but did not meet my expectations for improving control. The rear sway bar keeps the truck level with a load and has helps control the vehicle and trailer in cross winds. I have two large box trailers I tow, one is a 38' travel trailer, the other a 26' car hauler. I now have much more control and confidence when towing. Ford should ship any tucks that aren't a tremor or a raptor with a rear sway bar.
One word of caution: double, and triple check your Hellwig kit for fitment. I originally ordered the wrong kit based on a lack of detail between 4x4 and 2WD models. Kudos to etrailer, as they made it right after realizing the distinction wasn't easily found. If you have the correct kit, the rear sway bar sits level.
A few modifications. Had to cut/grind off break line brackets that were in the way of the brackets that attach to the axle and over the lip of the “pumpkin”. I have a Torklift Superhitch Magnum 30k mounted on the truck. The bracket that came with the kit were not used. I had to line the rod ends to the Torklift bracket and drill a hole to bolt them together. Even on the dually, it removed quite a bit of the side to side sway that you get from the tall slide in bed campers. I have an Arctic Fox which weighs around 4,000# when fully loaded.
Made a huge difference on my powerwagon with a fourwheel camper. The factory offroad suspension made it sway badly but this hellwig cured the issue. Must have, well made, etrailer rocks! I tried airbags first and they didn’t take the unsafe sway out, buy a hellwig!
Extremely easy to install. Seems like it is doing what it is supposed to do. Might need to make an adjustment to firm it up a notch.
Great addition! Improved ride over rough wash board and rough surfaces.
Outstanding product! Etrailer did a great job helping me with my needs! Thank You - David
Easy install with good components and clear instructions. Fit with airbags. Reduces body roll on truck with camper on.
We love that the website told us exactly what we would need for our truck. The order came promptly and accurately and was installed without any problems. Anxious to give it a try and see how it works. :-)
It's a good looking product and it's keeping my truck nice and stable after putting this big camper on it. Thank you
Mike L.
1/15/2026
We're glad to hear that Leon, thanks for checking in!!
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Teri
2/27/2026
We are so glad we made this upgrade to our truck camper set up. We have a very heavy truck camper and we noticed a significant difference in reduced sway on our 3-month journey from Florida to Nova Scotia. We would highly recommend this upgrade to anyone whos wondering if it will make a difference. It does!