Firestone Coil-Rite Air Helper Springs - Rear Axle
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2024 Ford F-59
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2024 Ford F-59
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Heavy cargo or tongue weight can pull the rear of your vehicle down and throw off your steering, braking, and headlight aim. The Firestone Coil-Rite Air Helper Springs #F4170 fit inside your existing rear coil springs to provide load-leveling support from at least 500 lbs up to 1,000 lbs. By restoring a level stance, they help maintain even tire contact with the road for more effective braking, smoother handling, and reduced tire wear when you’re hauling or towing.
Every trip and load is different, which is why these springs let you adjust pressure manually. Just add air through the included inflation valves to firm up support or let it down for a softer ride. With a full range from 5 psi to 35 psi, you can keep things stable under heavy loads or return to a comfortable ride when running light. Each side can be inflated independently to level off-center loads and keep body roll in check.
When the road turns rough or the weight shifts, these air springs act like an extra cushion inside your coil suspension. They absorb shocks and prevent bottoming out so you feel less bounce and sway. That added stability helps the vehicle stay planted on uneven pavement while keeping your cargo steady in back.
Made of elastic polyurethane, each air spring is designed for years of comfort and stability under heavy loading and adverse road conditions. The kit includes all necessary installation hardware, air line, and separate valves for manual inflation. Once installed, the springs quietly do their job—helping you maintain balance, reduce wear on your suspension parts, and keep every haul under control.
The construction material of the fittings may vary.
Customer Satisfaction Score:
93% were satisfied with this product
7% of customers were not satisfied
Ratings & Reviews
Darrel K.
8/25/2017
Well, they still work well, however they dont hold there pressure for more than a couple of weeks. Always checking them...adding air every few weeks
Jenny N.
3/21/2022
The installation of this kit is a more involved installation. I would not recommend removing the valves in the air bags though I understand that it worked in the short term. I recommend watching the video installation that we completed on a 2015 Hyundai Santa Fe.
Helpful Links
tv-install-firestone-coil-rite-rear-air-helper-springs-2015-hyundai-santa-fe-f4170.aspx
Nick
5/29/2013
The Santa Fe 2007-2009 has WAY to soft a rear suspension. In the UK they even have an OEM self leveling kit! But on in NA...So I bought the F4170 kit.Had it installed by a pro in June 2012.The mechanic last year did not trust the tubes or the connections. Felt like it was toys stuff. Not meant for 35lbs of pressure, not automotive grade.But it worked!What a different that made! It was great, my car behaved great even when fully loaded. It was an awesome solution, it proves the SF has a weak suspension, even though they say we it can loaded with 1100lb of gear. It was perfect, until the following spring. When I got to inflate them a year after installation, there was a leak. In both of them!! I lifted the car to check and one was totally torn open. There is a disc on top to protect the balloon, but it seems too small. Theres nothing to hold it centered, and thats probably what happened: it moved, got off center, and it could not protect the balloon from the jounce holder.For the other one, like mentioned above, the connections a weak. The mechanics calls them quick connect. Well you get the quality of a connection done quickly: not strong enough.Technically I am still under the 1 year warranty, well see. But if it was to do all over again, I probably would not choose that. Looks like I will have to repeat that every year... The thing dont last.
Patrick B.
5/29/2013
Howie K.
5/2/2014
Made another trip to Florida since installed..LOADED..... and the airbags performed very well. Level vehicle and no real noticeable harshness in the ride. Im a happy guy.We load the car, put kayaks on the roof and put about 350 lbs in a receiver hitch style carrier and the car is level and rides nice. I have nothing negative to say. Oh, I run 45 PSI loaded like this and it works great.
Jerome
7/7/2023
Didn’t last a month…
Katrina B.
7/28/2023
Sierra K.
7/7/2021
Thank you for your review. This product is covered under warranty. Customer Service will reach out to you.
Heather A.
8/22/2022
Christopher, please let us know if you would like to give us more information about why you gave the air springs a 1 star review. I am happy to assist you if you let us know what went wrong!
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Rory
10/7/2024
After a year. The bags have held up. The little 90 air connections did not. They failed and is nearly impossible to find after market replacements. I contacted Firestone and they sent me out the new and improved air connections. Way better. MY Santa fe is not designed to have air pillows and makes design for this vehicle a challenge. I am not totally happy with how these things need to be installed, but the quality of the bags and connections are top notch.