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When cargo or passengers weigh down the back end, the polyurethane air springs in this kit step in to keep things level. With up to 1,000 lbs of load-leveling support, they help prevent sag and maintain normal ride height. That means better steering and braking control and properly aimed headlights even when hauling heavy loads. By supporting your existing coil springs, they also reduce strain on your factory suspension and help your tires wear evenly.
Every trip is different, and being able to fine-tune pressure makes all the difference. These air bags let you set air pressure anywhere from 5 psi to 35 psi to get the right balance between comfort and support. With dual air lines installed, you can even inflate each spring independently to level off-center loads. Manual inflation valves are included for easy access, or you can add a compressor system later for in-cab control.
Extra weight can make any vehicle feel loose or unsteady over bumps or through curves. These molded polyurethane springs absorb road shock, cut down sway, and keep the body from bouncing around on uneven pavement. The result is a smoother, more controlled ride that feels “planted” whether you’re towing a small trailer or carrying a full trunk of gear.
This kit installs inside your existing rear coil springs using standard tools. All the necessary hardware, tubing, Schrader valves, and two heat shields come right in the box, so everything is ready for a clean install. Once in place, you’ll have an adjustable suspension setup that adds real-world support without changing how your vehicle drives when unloaded.
Ratings & Reviews

Katrina B.
8/29/2022
I see that you gave your experience with etrailer 1 star. If you give me more information about why you are disappointed in us, I will be happy to assist you.

Lazer S.
7/20/2026
Glad to hear they are making towing a more comfortable experience, Mark! Cool little camper as well! ^___^ Where did you guys take it?

Christopher H.
9/17/2026
Thanks for all of the detail here Charlie and really appreciate the photo!

Gwendolyn Y.
4/10/2025
The helpers look great on your Hummer, Rob! What kind of travel trailer are you hauling?


Rob
4/11/2026
I have towed my RV several times over the last year and these helper springs work perfectly! I had a very small air leak but I added some silicone at the airline connections and it is 100 percent! I carry a battery powered air compressor with me and it’s basically a “set it and forget it” systems.

Lazer S.
1/13/2026
Glad they are working well for you, Scott! I gotta ask, did you do the AHC delete as it was worn our or did you just not particularly like it? I've heard people do this for either reason.


Arthur
9/25/2025
The air springs are still operating as well as the day I installed them. They do not leak any air pressure nor have they degraded in any way. What a great and simple solution that lasts.

Donnie M.
6/16/2026
Well, after going back and forth - basically it comes down to - 60 day drive warranty doesnt compute. So after spending $300 on install, now Im expected to spend another $300-$400 to have them removed to return them, oh and pay for return. So roughly $800 to get back $130. Ill chalk this up to understanding that if a product doesnt work out in any manner. To remove these, you have to take the rearend of the car off - shocks and springs - then try to get the bags out of a much smaller ending without damaging otherwise youll not refund. Basically no support, other than a were sorry.


Gwendolyn Y.
5/20/2026
Thanks for the great follow-up review, Jimmy! Glad to hear the system made such a noticeable difference in both ride quality and suspension support, even when you’re not towing. It’s also great to hear the install videos helped out along the way. Air connections can definitely be the most finicky part of the install, so we appreciate you mentioning that for others considering the setup. Sounds like the end result was well worth the effort on your Pathfinder. Thanks again for sharing your experience a year later!

Big B.
8/3/2021
Still working great no leaks would buy againfor any senna rear with coils...

Big B.
4/2/2026
5 years later still working great hold air wo leaks and prevent bottoming while towing 3000 lbs

James D.
5/27/2026
Great tip about removing the three bolts, insight like this helps. Thanks for the response Todd and reach out if you need anything in the future!
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Christopher H.
8/4/2026
Thanks for your feedback Toby. Really appreciate you adding a photo!