1. Vehicle Suspension
  2. Firestone
  3. Air Springs
  4. Rear Axle Suspension Enhancement
  5. Light Duty
Firestone Coil-Rite Air Helper Springs - Rear Axle

Firestone Coil-Rite Air Helper Springs - Rear Axle

Item # F4108
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Vehicle Suspension

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Firestone Vehicle Suspension - F4108
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For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear. Lowest Prices for the best vehicle suspension from Firestone. Firestone Coil-Rite Air Helper Springs - Rear Axle part number F4108 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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Firestone Vehicle Suspension - F4108

  • Firestone
  • Air Springs
  • Rear Axle Suspension Enhancement
  • Light Duty

For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear.


Features:

  • Provide extra support for your existing rear coil springs
    • Fit inside existing coil spring suspension on your vehicle
  • Keep your vehicle level when you are hauling a heavy load
    • Improve steering control and balance
    • Level your headlight beams
    • Reduce tire wear
  • Maintain even load distribution with air pressure, leveling off-center loads
    • Air bags adjust manually, side to side, with individual inflation valves
  • Enable more effective braking and handling
    • Work under heavy loading and adverse road conditions
  • Increase stability to promote a smoother ride and prevent bottoming out
  • Made of durable, elastic polyurethane for years of comfort and stability
  • Include all materials necessary for installation
    • Brackets, air springs, hardware, air line and separate valves for manual inflation
    • Switches and gauges, compressors, and air tanks (sold separately) are available for quick and easy air spring inflation/deflation from inside your vehicle
  • Made in the USA


Specs:

  • Load-leveling capacity: at least 500 lbs (at most 1,000 lbs)
    • Coil-Rite springs will not increase your vehicle's weight-carrying capacity. Do not exceed the manufacturer's recommended weight limit.
  • Adjustable air pressure: 5 psi to 25 psi
  • Limited lifetime warranty on air springs
  • 2-Year limited warranty on hardware


Firestone Coil-Rite Air Spring Basics

Firestone Coil-Rite springs fit inside your existing rear coil springs to maximize the effectiveness of your suspension system. The added cushion provided by the air springs allows your vehicle to better handle a heavy load or trailer. Hauling heavy loads or towing a heavy trailer can make the rear of your vehicle sag and the front end rise. This puts more strain on your rear axle and reduces contact between your front tires and the road, causing problems with braking, steering control and traction. By adding air springs to your rear suspension, you can help to level your vehicle for more effective braking and handling under heavy loading or when you encounter adverse road conditions. The air springs also help to level your headlight beams and reduce wear on your tires.


Firestone Coil-Rite airline installation

Adjustable Air Pressure

The air pressure in your Coil-Rite springs can be adjusted manually, side to side, to compensate for off-center loads. A centered load improves the stability of your vehicle by reducing body roll. The air springs will also help to absorb road shock and soften contact between your axle and frame. This prevents bottoming out, thus improving ride comfort. Route the air line tubing for the springs to your vehicle's bumper to provide easy access to the manual inflation valves.


Firestone Coil-Rite air spring components

Air Spring Construction

Coil-Rite springs are constructed of durable, elastic polyurethane to ensure years of service. Single replacement springs (sold separately) are available for maintenance to an existing Coil-Rite kit.


Air Spring Installation

The Coil-Rite springs install inside your existing coil springs. The custom-fit springs attach to your vehicle's spring seats.



W237604108 Firestone Coil Rite Air Bags - Suspension Kit - Rear Axle

Firestone 4108

Installation Details F4108 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Firestone Coil-Rite Air Helper Springs - Rear Axle - F4108

Average Customer Rating:  4.4 out of 5 stars   (262 Customer Reviews)

For safety and stability, air springs are the perfect partner for your rear suspension when you are hauling heavy loads. Springs fit inside existing coil springs to help level your vehicle, improve braking and handling, and reduce tire wear.

- F4108
by:
2014 Cadillac Escalade

I installed these on my 2014 Cadillac Escalade ESV. I pull a 29’ enclosed snowmobile trailer with a 7,000# rating. These help tremendously with sag and sway and make life safer and easier when trailering, particularly when dealing with a crosswind. Installation is a little bit of a knuckle-buster but can be done easily at home. 570838



- F4108
by:
2004 Chevrolet Suburban

Plan on disconnecting bottom of shock and removing coil spring. Impossible to instal in coil spring while spring is on vehicle. Heat shields take a little time to get right 157921



- F4108
by:

I have a 2011 Avalanche and it became evident towing our 24' Trail Runner (6000lbs) that not only would I need the double sway system on the hitch but the Avalanche also needed more stability in the rear end. I purchased 'Firestone Coil-Rite Air Suspension' bags as an inexpensive way of meeting the demands of towing, and true to the advertisements, descriptions, and video, the Avalanche holds the road with little roll or recoil from the diverse conditions we have encountered over a distance so far of 12,000 miles (20,000kms). I run the bags at 20psi (max is 30psi) with and without the trailer. I left the installation of the bags to my mechanic and he was quite impressed with the simplicity and effectiveness of the system. Many thanks! 727415



- F4108
by:

Very satisfied with excellent service and quality products. 488468



- F4108
by:
2010 GMC Yukon

Leveled out my Yukon. Good for long hauls. Keep pressure. I check them before every haul and have not had to add air. I deflated them down to 10 psi over the winter since I only use my truck to tow a camper. The ride was similar to the original but with less body roll. They are well worth the money and take little effort to install. I would recommend coupling these with a higher load rated tire as well. I put on some Kumho AT's that were a bit grippy and load range E. It rides like a 3/4 truck when I have everything inflated and like my wife's luxury SUV again when I let some of the air out. Great combination. 288676



- F4108
by:
2009 Chevrolet Suburban

Good product with a relative ease of installation with the right tools. Only improvement would be to add a Tee in to the air line so there is only one needle valve for adding air in to the system. 249275



- F4108
by:
2006 Chevrolet Avalanche

Very happy with this product. Easy installation. Air bags do not effect day to day driving even at max pressure since they are not as tall as the Spring it is inside, but are very effective once the weight has been added to make for safer handling. 249274



- F4108
by:
2000 Chevrolet Tahoe

Having had them on for a year now...Excellent! I was skeptical because of the cheap price as I am used to the higher quality rubber/metal frame units but they have done the light duty job I bought them for. Installation was challenging in order to squeeze them through the coils but it is do-able. I mounted these inside of a 2000 Tahoe. I mounted the bags with the air line to the top and ziptied the lines along the wiring conduit. Valves were installed in the rear bumper next to the plate which is perfect because at night time they are illuminated by the plate lights. I run 20lbs at all times. One thing I would recommend is buying an airline T and using only one air line for fill/deflate. Two is a pain. I used to have one on my old set up and it was far easier. The T collects both lines behind the bumper. Enjoy. 224920



- F4108
by:
2005 Chevrolet Suburban

Very good product and very simple to in stall. 173505



- F4108
by:

I am very satisfied with your products your service and your shipping is fast and reliable 125470



- F4108
by:

great product. etrailer staff couldn't be better 123080



- F4108
by:
2003 GMC Yukon

The air bagsy fit nicely into the coil springs so there are really no modifications needed to install them. The exhaust shields are easily shaped to fit onto the tail pipe where it wraps over the axle. The only hic- up I had was the installation instructions did not include a diagram of the hose routing for my vehicle, which tells you to mount the bags with air line out the top or out the bottom. I found there was more room out the top and a shorter route for the air lines to be ran. 63562


Comments
Tim, Firestone does not include instructions on howwhere to run the lines as so many people want or need to locate them differently, even on the same vehicle.Some like the fittings mounted through the bumper for easy access, others like them hidden underneath, and others still need to run them forward to a remotely controlled air compressor under the vehicle.
-- Patrick B - 01/21/2013

881

- F4108
by:
2009 Chevrolet Avalanche

The directions are set up to cover a wide variety of vehicles. There are pages inserted for adjustments to the instructions for a smaller group of vehicles closely related to mine. I still found them confusing and not very clear. Once I got past trying to do exactly what the instructions (or at least the pictures) were saying, I was able to just look at my setup and install the air springs. The picture for the inserted heat shield instructions was the most confusing because it shows the air hose on the top but for my Avalanche (and I believe most late GM SUVs) the air hose is on the bottom. On the positive side the product appears to be of strong construction for the springs, hose, and the fittings. I'm confident it will greatly improve my Avalanche's ability to tow my trailer safely 61590



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


Good product. takes some effort getting the bag inside the coils. As far as removing the frame bumper - didn't do it - it is pressed in between the frame and top of coil spring. So far so good 514375



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


I received my order and installed the Air Helper Springs the next day. I had the opportunity to fully test them yesterday. They were not difficult to install and the instructions were easy to follow. I do wish there had been a video for my particular vehicle since I’m not exactly sure my routing of the air line around the exhaust the best location. Time will tell. After hooking up my trailer I adjusted the air, best I could, since all my tire gauges start at 10 lbs and go up from there. I did get the rear of the Pathfinder as level as I could. A recommendation from etrailer on a good digital or analog gauge would have also been helpful. I did pick up a digital gauge today, works great. Thanks etrailer for a great products, instructions and your follow up email that answered my questions, 513109


Comments
Excellent! I use it when I tow my equipment trailer and I haven’t had “any” problems. I did alter the hose configuration to a single point of air input instead of a valve for each bag. I know their reasoning but single input works better for me.
Kevin S - 05/26/2019

55749

- F4170
by:

Review from a similar Coil-Rite in Vehicle Suspension


Product is what you see on the web page and the videos exclent its idiot prove 411973



- F4174
by:

Review from a similar Coil-Rite in Vehicle Suspension


Thanks to all of the folks who shared their observations on the installation of Firestone Air Helper Springs on Toyota RAV4s. Some of their suggestions made my life much easier. The Firestone instructions, as others observed, were pretty generic and were probably not written by a person who actually installed them on a RAV4. Here are a few things that I found useful: I found that the easiest way to cram the air bags into the coil springs was to flatten them like a pancake with the top and bottom surfaces collapsed onto each other and lash them in this state with a zip tie. Compressed this way you can push them thru the gap in the coil spring in the correct orientation so that when you release the zip tie they expand into the coil spring correctly. It helps to push them thru an opening just below the center of the coil spring so that the air bag ends up slightly below center touching the bottom plastic protective disk. It is really difficult to move the air bags up or down once they expand into the coil spring. I attached the air hose after the bag was in place. You can use a heat gun to warm the air hose enough to bend it so that it exits the lower control arm, turns 90 degrees, and runs along the back of the control arm without hanging down. As others noted the exhaust system presents special problems on the right side. I ended up routing the air line toward the brake and up to the upper control arm to stay away from the exhaust pipe. It's not clear what the best strategy is for routing the air lines. They seem pretty tough, but will likely be rubbing on something given all of the movement in the suspension. I'd suggest not cutting the air line and starting with the right side, which for me needed more air line length to keep away from the exhaust system. That way you will have enough air line to finish the right side and you can use the remainder on the left side, which will need less. I cut the line in half to begin with and barely had enough for the right side. All of the bits seem to be of high quality. The quick connect air fittings seem to seal well and grab tenaciously so you will have a very hard time removing them once you install them. Like a Chinese puzzle on steroids. Our trailer has around 440lb tongue weight and these have brought us back to level with a few psi to spare. We'll see how it goes over the road. Thanks to everyone who contributed ideas and suggestions. 161229



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


I got the a draw tite hitch, wiring harness and Firestone coil helpers for my 2016 Nissan pathfinder. Everything fit great and was easy to install. The price was awesome and shipping was super fast. An easy A+ for etrailer.com. 343985



- F4105
by:

Review from a similar Coil-Rite in Vehicle Suspension


Did not work at all on my 11altima. No change to the suspension and the bags deformed beyond recognition after 2 weeks 260702



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


Easy installation fixed my problem of low ride height. The only thing I would change is I wish there was a 90° angle for the bottom so it doesn't stick so far out I know it's going to end up catching things on the road 595108



- F4155
by:

Review from a similar Coil-Rite in Vehicle Suspension


I installed Firestone Coil-Rite Air Helper Springs and they work great. With minimum air pressure they improved the unloaded ride and driveability. Loaded the van for vacation, added air pressure to bring the ride height back to the normal ride level and the van drove and handled better than when it was new. Followed your on-line installation video and installation was a breeze. The installation instructions with the kit were poor and incomplete. . 139788



- F4174
by:

Review from a similar Coil-Rite in Vehicle Suspension


As a former mechanic, this was a tough install. It was a struggle to get the air bags through the springs and there was not enough room to remove the 3" piece of tubing so I installed the bag with the full length of tubing already in place. I was hoping to gain about a 2" lift, but it only raises the vehicle about 3/4 of an inch. The bags do make a noticeable difference in handling and the hitch is not so close to the ground while hauling a trailer. 103341



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


We ordered a suspension kit it came right away and at a great price. We had checked out several shops in town who said they were hard to get for our new vehicle and the cost was out of this world. Great job guys 165779



- F4118
by:

Review from a similar Coil-Rite in Vehicle Suspension


I've installed the air springs and and they hold up great. I'm pulling a tall 5 x 10 enclosed trailer and no more sagging in the rear end. Air up the bags to 35 max PSI and the ride quality is excellent. 715974



- F4155
by:

Review from a similar Coil-Rite in Vehicle Suspension


This Firestone #F4155 air-bag product is excellent. The fit to my 2011 Toyota Sienna was just as described. I installed the bracket and the two air-fill valves in the jack compartment, easy to get to and out of the weather. etrailer has been a pleasure to deal with. 172005


Comments
Love the product. Had it installed by my favorite local Toyota dealer. Makes a nice difference towing our Park Liner Fiberglass Egg Camper. Would certainly recommend.
Bruce B - 02/01/2016

16645
25
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Ask the Experts about this Firestone Vehicle Suspension

  • What Is the PSI Rating for Firestone Coil-Rite Air Helper Springs for 2010 Chevy Suburban
    The Firestone Coil-Rite Air Helper Springs part # F4108 which are a fit for a 2010 Chevrolet Suburban without auto-level suspension have a minimum pressure of 5 psi and a maximum pressure of 25 psi according to Firestone. The weight capacity is 1,000 lbs, you don't have to be at max psi to achieve this though you would most likely need to in order to reduce sag/squat. The air bags do indeed need to have at least 5 psi in them at all times.
    view full answer...
  • How To Help With Rear Sag While Towing With a 2007 GMC Envoy and Quality S WDH
    It does sound like the spring bars that you have are underrated for your trailer which is then not allowing the tongue weight to be transferred to the front of the tow vehicle which results in too much sag. As we do not carry the Quality S Weight Distribution System, I unfortunately would not have the correct replacement spring bars for you nor am I aware if they are even available. That said, the most cost effective option you have to help get rid of the sag would be to use the Firestone...
    view full answer...
  • Firestone Air Bag Kit Recommendation for 2005 Chevy Suburban
    For a Firestone air bag kit that is a confirmed fit for your 2005 Chevy Suburban the correct fit is the part # F4108 and not the kit you mentioned.
    view full answer...
  • Rear Helper Springs for a 2007 Chevy Suburban 1500 with Factory Auto-Leveling System
    I do have a solution for you but air springs such as # F4108 will not fit on a 2007 Chevy Suburban 1500 that has the factory auto-leveling option. What I recommend is to use Timbren helper springs # TGMRYS4 that fit in place of the factory bump stops because they won't interfere with the factory auto-leveling system. I have linked a video showing an example installation and a link to our informational article on Timbren springs for you to view.
    view full answer...
  • Rear Suspension Enhancement for 2003 Chevy Tahoe to Reduce Sag When Towing
    We have suspension enhancement that will help beef up the rear suspension of your 2003 Chevy Tahoe but nothing will give you more towing capacity than you have so you'll want to make sure you don't exceed your towing capacity. These kits will only help you tow within your capacity in a safer, more supported way. The Firestone air bag kit part # F4108 that you referenced is a fit for your Tahoe and will give you the rear suspension support you are looking for when towing.
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  • Recommended Suspension Air Bags for a 2008 Chevy Avalanche with Factory Auto-Leveling Option
    What I recommend is going with the Timbren vehicle suspension # TGMRYS4 (2WD or 4WD)because the hollow rubber springs sit above the axle and they are easy to install. It will also be compatible with your auto-leveling system. Also, the Timbren suspension will offer progressive resistance, meaning they won't change the ride until you load up weight. The weight capacity is 6,000 pounds but don't exceed your Chevy Avalanche's weight carrying capacity. Keep in mind that adding any suspension...
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  • Suspension Enhancement for Lifted 2003 Chevy Z71 Suburban-1500 4x4 Used with Weight Distribution
    Thank you for including a photo of your 2003 Suburban 1500 and hitched Jayco toy hauler trailer. If your Suburban's suspension is still in good working order and not suffering sag from simply being well worn, and if the vehicle is being used within its rated towing capacity, then you should be able to correct the rear-end sag when towing your Jayco toy hauler by adjusting your weight distribution (WD) system. You will first want to confirm that the WD system is suitably rated for your...
    view full answer...
  • Replacement Air Spring Recommendation for a 2003 Hummer H2 with Firestone Coil-Rite Springs
    Yes, if you have the Firestone Coil-Rite Air Helper Springs # F4108 kit in your 2003 Hummer H3 you would want a Replacement Air Spring # F6003.
    view full answer...
  • Tips for Reducing Harmonic Bouncing While Towing with Weight Distribution
    A couple things that can contribute to harmonic bouncing are improper tire type and improper tongue weight. You will want to be using LT tires as they have stiffer sidewalls which are better for towing than P rated tires. Also, be sure that your tongue weight is between 10-15 percent of the total trailer weight. You may need to move cargo around in your trailer to accomplish this. Lastly you will want to verify that your WD system is setup properly.
    view full answer...
  • Towing Capacity of a 2011 Chevrolet Avalanche with HD Towing Package
    According to the owner's manual for your 2011 Chevrolet Avalanche, if you have the HD towing package and it is 2WD than your maximum towing capacity is 8,100 lbs but if you have the HD towing package and it is 4WD than your maximum towing capacity is 7,900 lbs. Regardless of if you have 2WD or 4WD, the gross combined weight rating (GCWR) which is the maximum weight allowed for the vehicle with cargo and a trailer is 14,000 lbs. With that being said as long as your trailer and cargo...
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  • Correct Firestone Coil-Rite Air Helper Springs for a 2009 GMC Yukon
    There are two Firestone Coil-Rite Air Helper Springs for a 2009 GMC Yukon (All Models), part # F4186 if you have the factory autolevel suspension or part # F4108 if you don't. I just recently installed these on a Chevy Avalanche (Same Coil Springs) if you would like to take a look.
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  • Firestone Coil-Right Air Helper Springs Fit 2007 Chevrolet Suburban 1500
    I believe you are referring to the Firestone Coil-Right Air Helper Spring # F4108. The # F4108 suspension enhancement kit is confirmed to fit the 2007 Chevrolet Suburban 1500. I have attached the installation instructions from the kit for you to check out. If this is not the product you were referring to, please let me know the correct product and I will be happy to find an answer for you.
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  • Weight Distribution System Recommendation for a 2006 Chevy Trailblazer
    The Timbren suspension system part # TGMRETB that you referenced has been confirmed to fit your 2006 Chevy Trailblazer so it would work on your vehicle and would provide you with additional support for your rear suspension. If you prefer the adjustability of an air ride, then the Firestone Coil-Rite Air Helper Springs # F4108 are a great option. The best solution though would be to go with a weight distribution system as suspension enhancement is more designed for carrying heavy loads...
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  • Helper Springs for a 2002 Chevy Avalanche Z71 with 6 Inch Lift
    Since the springs are longer than stock on your 2002 Chevy Avalanche air bags that fit inside the springs, such as # F4108 will not work. There are not spacers available that would work either. But I do have a solution for you. You could use Timbren springs # TGMRG25C for a 1500 or # TGMRSB4S for a 2500. Then you would need 8 of the 1 inch spacers, # A25723-90AH00, 4 for each side. Timbren does not recommend using any more spacers than that so there will still be a little travel before...
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  • How to Reduce Sag on 2018 Chevy Suburban Premier with Weight Distribution System Already Installed
    If you are still getting a lot of rear sag on your 2018 Chevy Suburban Premier when hooked up to your trailer the first thing I recommend doing is simply checking to make sure your existing weight distribution is both properly rated and correctly adjusted. It is important that your setup's total tongue weight, which includes the loaded weight of the trailer along with any additional cargo weight coming from behind the rear axle of the Suburban, falls comfortably within the system's operating...
    view full answer...
  • Air Spring Comparison for 2007 Cadillac Escalade ESV
    Both the Firestone # F4108 and Air Lift # AL60769 helper springs are confirmed to fit your Cadillac Escalade as long as you don't have the auto-leveling option. If your Caddy has the auto-leveling you'll need to go with the Firestone. There isn't a lot to separate the two. They install the same and have the same purpose and ratings. Firestone does have the brand recognition. You really can't go wrong either way.
    view full answer...
  • Suspension Enhancement for a 2003 Chevy Tahoe with Auto Level Rear Suspension
    I recommend installing a set of Timbren springs for added support. They will provide the support you need without having to run air lines and fill up or deflate air bags. Please keep in mind that adding Timbren springs or any suspension enhancement product may not stop the auto-leveling motor from running, but there is a very good chance that it will. If you have a 4-wheel drive model use # TGMRG25C. For a 2-Wheel drive model use # TGMRYS4. Be sure to check your vehicle owners manual...
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  • Can Air Bag Helper Springs be Tied Into Air Shock Compressor on a 2008 Cadillac Escalade
    The air shocks on your 2008 Cadillac Escalade only have the capacity for a certain amount of air and the compressor system on the vehicle is designed for that. If you add volume by installing additional air bags the system may not function properly or in a way that you want it to. Instead of using the air bags with the air shocks I recommend using Timbren helper springs, # TGMRYS4. With this system there is no maintenance and you will not have to worry about air compressors at all. It...
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  • Troubleshooting Bouncy Ride on a 2014 Chevy Suburban 1500 When Using Weight Distribution
    It is not recommended to use any type of suspension enhancement when using a weight distribution system. The two systems will work against each other and would provide an unsafe, unpredictable ride quality. Your best option would be to make sure the weight distribution system you are using is rated for your setup and that it is set up properly. If your system is rated for your trailer you can check out the link I attached that has all of the Reese spring bars we offer. You will want...
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  • Suspension Enhancement Recommendation for 2016 Chevy Suburban
    Considering the relative light weight of your trailer I would go with a suspension enhancement setup for your 2016 Chevy Suburban to reduce the sag. For that the air bag system par # F4108 will give you the flexibility in support to allow you to tailor the amount of support you would need. The sag is related to the ride quality everyone wants now. Stiff suspension rides rough and nobody wants to deal with that any more. So the soft suspension allows the ride quality to be great but at...
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  • Why Would Tow Vehicle Still Sag with Andersen Weight Distribution System being Used
    The Andersen weight distribution system isn't as effective as other systems. The reason you are still experiencing sag with a weight distribution system is solely because of how ineffective that system is. The chains they use instead of spring bars just doesn't work as well. Your best solution is going to be to go to a more effective system like the Reese kit part # RP66541 which will easily allow your Suburban to sit level. Suspension enhancement like the Coil Rite kit part # F4108...
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  • Comparing Timbren and Firestone Vehicle Suspension Enhancement for a 2003 Chevy Avalanche 1500
    In terms of capacity, the Timbren Rear Suspension Enhancement System, # TGMRG25C, for a 2003 Chevy Avalanche 1500 has quite a bit more; a total capacity of 6,000 pounds. Compare that to the maximum 1,000 pound capacity of the Firestone Vehicle Suspension, # F4108. Both systems will offer similar benefits including helping to keep loads level, improved steering and balance, a better ride, and will prevent the vehicle from bottoming out. The Firestone system can be leveled side to side...
    view full answer...
  • Availability of Suspension Enhancement For the Rear of a 2002 Chevrolet Suburban 1500 4WD
    For your 2002 Chevrolet Suburban 1500 4WD I have the Timbren Rear Suspension Enhancement System, part # TGMRYS4, that you have referenced. These are hollow rubber springs that will become more rigid as more weight is added. The weight capacity is 6,000 lbs. I am including a link to the installation instructions on the Timbren system. Also, I have the Firestone Coil-Rite Air Helper Springs-Rear, part # F4108, for your vehicle. This air springs will fit inside your coil springs and can...
    view full answer...
  • Weight Distribution and Sway Control Recommendation For a Pole Tongue Snowmobile Trailer
    The first factor that we will want to check is how much room is available on your pole tongue. To use weight distribution with a pole tongue, you will need a pole tongue adapter. Our best option is the Reese Pole-Tongue Adapter, # RP58393, because it requires the least amount of tongue space. This adapter must mount at least 29 inches back from the center of the ball coupler on your trailer. If you do not have 29 inches available, then there are no adapters available and at that point we...
    view full answer...
  • Troubleshooting a 2002 Chevrolet Tahoe that Sways
    If the factory sway bar on your 2002 Chevrolet Tahoe needs to be replaced use # RM-1109-168. If the suspension system of the Tahoe is in good working order and you're looking to improve the ride while under a load you can use a suspension enhancement system. The Firestone Coil-Rite Air Helper Springs # F4108 are confirmed to fit your Tahoe and help improve its stability. The springs install inside the existing factory coil spring suspension.
    view full answer...
  • Firestone Air Helper Springs for a 2007 Chevy Suburban 1500
    We have numerous suspension enhancement components available for a 2007 Chevy Suburban, see link. If you are looking for Firestone air helper springs, you can use # F4108. I have included a link to the installation instructions. I have also included some links to FAQ articles covering Firestone products. You can inflate the springs using an air compressor like you might find at a gas station, but you can also add a kit with an on-board compressor so you never have to leave the vehicle....
    view full answer...
  • How do You Install Air Springs on a 2002 Chevrolet Trailblazer
    Firestone offers a kit for a 2002 Chevrolet Trailblazer 2WD, part # F4108. The air springs fit inside the coil springs and can be inflated or deflated depending on load. I have provided a link below to the instructions that come with the kit and walk through the installation. You would jack the Trailblazer until all the weight is off the rear axle and the rear suspension is fully extended. From here you can put the Air Helper Springs inside the coil springs. If more room is needed, the...
    view full answer...
  • Weight Distribution or Suspension Enhancement For 2001 Chevrolet Suburban Towing a 26 Foot Trailer
    I recommend to first check the gross towing weight (GTW) capacity and tongue weight (TW) capacity on your Class III hitch that is on your 2001 Chevrolet Suburban 1500. Most Class III hitches are rated for 6,000 lbs GTW and 600 lbs TW without weight distribution and 10,000 lbs GTW and 1,000 lbs TW with weight distribution. Some Class III can be listed as 3,500 GTW and 350 lbs TW capacities and not rated for use with weight distribution. A weight distribution system, like the Reese Weight...
    view full answer...
  • Suspension Enhancement Recommendation for a 2007 GMC Yukon
    It sounds like you are actually looking for a rear suspension enhancement setup for your 2007 GMC Yukon. The part # F9000 is just a replacement part for a system that isn't designed for your vehicle. Because of that I would not recommend it for you regardless of it's dimensions. Instead you would want the Firestone Coil Rite kit part # F4108 as it has been confirmed to fit your vehicle and comes with all of the necessary hardware.
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  • Differences Between K Source Custom Towing Mirrors, Recommended Sway Control For '03 Chevy Avalanche
    The only difference is K Source Custom Towing Mirrors, part # KS62075-76G have LED turn signals and # KS62075-76GE do not. Other than that they are the same product. Air Helper Springs, like The Firestone Ride-Rite # F4108, will help control sway on rough terrain, but the main purpose of air helper springs is to keep your vehicle level when hauling heavy loads and level off-center loads. Since you already have a weight distribution system with sway control and feel like you need more...
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Info for this part was:

Updated by:
Leah B
Updated by:
Mary E
Updated by:
Sarah W
Updated by:
Alex H
Updated by:
Matthew E
Written by:
Tyler C
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Joshua S
Video Edited:
Jacob T
Video Edited:
Chris R
Test Fit:
Brent H
Test Fit:
Conner L
Test Fit:
David F
Video by:
Jonathan Y
Installed by:
Robert C

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