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When you’re loaded down and the rear starts to wallow, this bar keeps things steady. The solid 1-5/16" diameter 4140 chromoly steel design ties the rear axle to the chassis to cut down on side-to-side movement. With three adjustment holes, you can dial in the stiffness that best fits your load—firmer for heavy towing or lighter for everyday use. The result is a level, confident feel even when you’re hauling serious weight.
Crosswinds and passing semis don’t have to keep you gripping the wheel. The Hellwig Adjustable Big Wig Rear Anti-Sway Bar minimizes sway and lean so the truck tracks straight and feels planted. By balancing the rear suspension, it helps you hold your line through gusts, curves, and uneven pavement without constant steering corrections.
A stable ride isn’t just about comfort—it’s about endurance. By reducing the constant motion that forces you to counter-steer, this bar helps you stay focused and relaxed behind the wheel. The truck feels composed and easier to manage over long distances, cutting down on the mental and physical strain that comes from fighting sway all day.
This system trades basic rubber bushings for polyurethane, which resists oil, gasoline, and ozone so it won’t break down or squish out over time. Less flex means more consistent support mile after mile. The bar itself wears a corrosion-resistant silver vein hammer-tone powder coat, while the brackets and end links use a black powder coat for long-term protection and clean looks.
You don’t need to drill into the frame to add stability. The Hellwig Big Wig bolts on with the included zinc-plated hardware and bushing lubricant. It’s a clean, direct setup that gets you back on the road faster with a noticeable boost in handling and control.
Customer Satisfaction Score:
88% were satisfied with this product
12% of customers were not satisfied
Ratings & Reviews
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.
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!
Perfect fit!
Easy to install yourself, if handy & have the tools. Tip; use a vise to press in the bushings into the endlinks
Order was received quickly.
Package never showed up. No proof of delivery with photos. And I have to wait up to eight days to get my money back… never buy anything from here again. Horrible
Is to easy by yourself, my f250 handles much better when towing a 5th wheel
Installed on a 2024 F250. I pull a 32 foot, 9k#, bumper pull travel trailer and was hoping for additional stability. Over large bumps I noticed the truck moving a lot in the lane from the trailer pushing the rear end around. Adding the rear sway bar tightened this up with a noticeable difference in stability and reduction in trailer sway. Only concern is the adjustable brackets don't adjust long enough to level the sway bar. Could use an addition 1-2" of length.
Just got it installed, but the first drive I could tell a noticeable difference. Clearances were a bit of an issue on my 2026 F-350, so not 5 stars. Looking forward to our first camper trip with it installed.
I installed it on my 2022 f250. With my truck camper on the truck I can drive down the road without the body roll and sway I had with the stock set-up. I installed the matching heavy duty front sway bar as well.
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!!!!!
Do you have a question about this Anti-Sway Bar?
Condition: Missing Parts
Notes: Replacement sway bar, but only the bar. no hardware included, otherwise in like new condition
Condition: Installed
Notes: Soft installed, some minor scuffs to paint, otherwise in like new condition.
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Kate F.
6/25/2026
Thanks for the great review Joseph, even though your order was not the greatest experience, and realizing that we are not UPS. Paula is great! I sent your review over to her and she appreciates your kind words. On a different note, I have the Hellwig on our 2024 Silverado 1500, made a huge difference with that body roll! You will definitely notice a great difference when you get it installed.