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Timbren Front Suspension Enhancement System

Timbren Front Suspension Enhancement System

Item # TGMFK25S
Our Price: $252.45
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14,000-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use. Great Prices for the best vehicle suspension from Timbren. Timbren Front Suspension Enhancement System part number TGMFK25S can be ordered online at or call 1-800-940-8924 for expert service.
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Timbren Vehicle Suspension - TGMFK25S

  • Jounce-Style Springs
  • Front Axle Suspension Enhancement
  • Timbren
  • Extra Heavy Duty

14,000-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


  • Improves suspension and handling
    • Prevents body roll with improved weight distribution
    • Stabilizes the vehicle for better handling of heavy loads
  • Adjusts progressively to the road and the load so you always have a smooth, comfortable ride
    • Provides additional support as needed
      • Allows the spring ample movement while at the same time providing cushioning for light loads
      • Increases stability and great performance while cornering, swerving or hauling large loads
  • Takes the brunt of bumps and rough roads
    • Extends the life of your vehicle's suspension
      • Designed to work with a suspension system that is in good working order
  • Requires no air hoses, compressors or manual adjustments


  • Includes 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
    • Replaces axle bump stops on frame
    • No drilling required
  • Capacity: 14,000 lbs
    • Do not exceed the vehicle's weight-carrying capacity
  • Designed to work with a suspension system that is in good working order
  • Limited lifetime warranty - satisfaction guarantee

Reduced axle sag with Timbren suspension enhancement

Just like the rear of your vehicle will sag under the weight of a fully loaded bed, the front of your vehicle will sag when under the burden of heavy equipment such as a snowplow. In this case, the front axle is handling not only the weight of the equipment, but also more of the vehicle's weight. Overall vehicle handling - traction, steering, and braking - is negatively affected. But the resistance from Timbren's Suspension Enhancement System works with your factory suspension to keep your vehicle level and improve your driving experience.

Install diagrams of Timbren hollow rubber springs

The Timbren system comes with custom-fit brackets that are bolted onto each frame rail above your front axle. Hollow rubber springs are bolted to the bottom of the bracket and hang down so that the bottom of each spring touches the axle. Because each spring is making constant contact with the axle, it is always working to cushion and support your factory suspension.

Animation of a standard Timbren rubber spring

Timbren Suspension Enhancement Systems are designed to work progressively. When the hollow rubber springs are compressed, the convoluted design causes them to quickly collapse along the folds. Once the folds are compacted, the stacked barrel shape increases resistance, stiffening the suspension and keeping your vehicle level.

Timbren suspension system works to prevent body roll

Each hollow rubber spring works independently to support the driver's-side or passenger's-side of your vehicle. This is helpful when you swerve or make sharp turns. Each spring is activated when it is needed, so body roll is greatly reduced. The independent action also works well when you're carrying off-center loads.

A snowplow mounted to the front of the truck will require extra suspension support for the front axle.

Timbren's Suspension Enhancement System will help raise the front end of your vehicle when you're using heavy equipment like a snowplow. This ensures that your headlight beams will be pointed in the right direction and tire wear will be reduced. If the plow is off-center or has an extension, the springs will automatically compensate for this as well.

An empty truck on a bumpy road without Timbren

Another great feature of the rubber construction is that the springs absorb most of the road shock, creating a smoother, more stable ride overall. Wear and tear on the factory suspension is also lessened because the rubber springs work to prevent bottoming out on rough roads.

Timbren Suspension Enhancement Compared to the Competition

Timbren's Suspension Enhancement Systems are much easier to install than air springs - there are no air hoses to run, no compressors or gauges to hook up, and no manual adjustments to make. The rubber construction makes Timbren's springs more elastic than similar products constructed of microcellular urethane. More elasticity allows for a more comfortable ride because the rubber has more travel.

GMFK25S - Front Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TGMFK25S Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Timbren Front Suspension Enhancement System - TGMFK25S

Average Customer Rating:  4.7 out of 5 stars   (4784 Customer Reviews)

14,000-lb Capacity. Great for trucks with plows, these front hollow rubber springs help to stabilize and level your vehicle. They also provide a more comfortable ride by absorbing road shock and improving roll stability. Easy to install and use.


I had a problem with getting front sumo springs relative to the rear sumo springs I purchased earlier; however, the staff at etrailer were very helpful in getting me a suspension enhancement component made by timbren which I just installed. I believe the timbren supports are going to do the job I was looking for and make me just as happy as I am with the rear sumo springs. You will notice from the photos the supports make direct contact; however, the pictures were taken on a unlevel surface and when the truck is on a level surface the direct contact is equal on either side. Also, the timbren supports provide substantially more weight capacity in the event I choose to haul my scooter on the front end of the truck. Thanks again Derek S and etrailer staff I am very pleased with the service, customer relations and professionalism experienced when ordering my parts. Thank you, Bobby (Louisiana).

The timbren springs are working out better than expected. I installled new Monroe matic RV shocks front and rear on my 2006 Chevy Silverado 1500 just prior to putting the timbrens on the front and the sumo springs on the rear and the ride is great especially with a load or hauling my travel trailer and the ride is just as smooth empty. I highly recommend the timbren and sumo springs because they fit by application and there is nothing additional to buy. Thanks etrailer.
Bobby L - 05/10/2020


i have used the timbren 4 different times for chevy front ends they are a must have if you use a plow

all 4 are still doing very well thank you for a quality product
TED W - 11/25/2022


I have owned and used these over a year now. They honestly still look brand new. When recently I changed my upper and lower ball joints all I needed to do with these was to clean off the dust and dirt. I used my vehicle with these installed most off road and in the woods and they hold up very well and so far 4x longer than OEM!


I’ve bought a few sets of these.

2008 Chevrolet Silverado

My one-ton is a 2008 Chevy Silverado. As I drove with my 5th wheel I knew it needed some help. The folks at etrailer were great to suggest what I needed. Sure I still have bumps, but not as bad.

2003 GMC Sierra

works great

1999 Chevrolet Silverado

this is the 3rd replacement of bump stops for my 99 chevy 3/4 HD 4x4. Two were OEM , and one an after market ( lasted a week ! ). I am impressed that the Timbren bump stops are well made and were a direct fit. The truck sits about an inch higher in the front end and best of all the ride is smoother . the truck also has new up graded shocks and the over all condition of the suspension is very sound. the shocks were installed prior to these new bump stops. I would give 5 stars however I am waiting this out to see what the Timbren bump stops are capable of in a year from know. my truck spends most of its time on road not off road .

I would buy again . these are worth 5 stars.
Gene - 06/01/2017

2000 Ram 2500

I ordered timbrens for the front and rear of my chevy 2500. I have a 2000 lb truck camper and I wanted something to help carry the load a little better. I had no idea that my front bump stops had worn away to almost nothing until I installed these. They have worn well and performed well so far.

Still working great. No problems. Really happy I didnt waste the money on airbags.
Josh - 04/16/2020

2003 Chevrolet Silverado

My 03' Chevy Silverado really benefited from the installation of the Timbren bushings. Shipping was fast the instructions from E-trailer were very helpful and made it easy to DIY. The front end of the truck seemed to be sagging especially when the plow was raised even with 600 lbs of ballast. The front end was raised up about 3/4" after the install and the ride quality is greatly improved overall. I cannot hardly wait to try them with the plow. I would highly recommend Timbren bushings to anybody with a higher mileage vehicle like mine 160,000.

These will be going on every truck I buy from now on.
P. M - 10/05/2017

2005 Chevrolet Silverado

Installed this on my 2005 Silverado 2500HD with the 8.1l engine. Easy 1.5 hour install with hand tools. Raised front of truck about 1" with constant contact with rubber. I'm installing a Boss V Snow Plow and a Truck bed Camper ( for Summer) and needed the extra weight capacity without the suspension sag. Ride quality degraded some, but is not objectionable. Ride is OK for a truck. This is a better solution than changing to stiffer torsion bars or cranking up the stock bars for my application.

2009 Ram 2500

I am impressed with the timkens. Got a 2009 GMC 2500 hd and Western 8.5' v plow. Nose dive was an understatement before. However I put a 2" leveling kit and installed the timkens at the same time. One of them made my truck ride horrible. Probably the leveling kit from the torsion bars being turned in. I do notice tho that empty going over a jarring bump you can feel the timkens hitting hard. But with a plow on the truck it is the way to go. After this winter I'm gonna take them off and put stok back on for the summer. It's one bolt to replace them install was a piece of cake.

Chevy 2500HD Silverado

Timbren SES heavy duty jounce bumpers dramatically improved the ride of my Chevy 2500HD and it drops only a very small amount when I hoist the plow. Less than 1/2" dropbin ride height with the plow raised. Yet the riee is not harsh. Excellent product, wish I knew about it years ago.


Works great on my 2005 2500hd towing my 42 ft fifth wheel. Have them on the back also. No suspension sag and no sway,very impressed.
Fit was correct easy install. Just as good as air bags.


Works great on my 2005 2500hd towing my 42 ft fifth wheel. Have them on the back also. No suspension sag and no sway,very impressed.
Fit was correct easy install. Just as good as air bags.


Easy to install, really improved the handling when towing

2006 GMC Sierra

Highly recommend spending the money. My last pickup I bought Sumo Spring rubber stops and they seemed squishy to me, where these are hard and hold up very well. Holds my Boss V-XT 8'2" up where it needs to be. Don't go cheap! You'll regret it!

2006 GMC Sierra

Works very well in the front of the truck. Made the truck sit 1" higher. Supports the snow plow well.


I had a little problem with the web page. So I called etrailer and Greg helped me with my order. So now I understand their web site better and will purchase more product in the future. Thanks! Mike

Chevrolet Silverado 2500

Easy to install, keeps the front end up with the snow plow on our 2500 Silverado


I like that when I put my plow on the truck the timbren with stands the load and handles great thanks


Little bit rougher ride but worth it in Plow holding capability when traveling. It's nice to not have the front end squatting so much. Excellent product will definitely be purchasing again when I get a new truck.

2005 GMC Sierra

Love them the are great we use them on our plow trucks they handle the load very well


What a difference made the truck handle better and the front end is so much stronger


They fit well, no notable change in ride quality unloaded. Im happy with them so far.


should have bought this a long time ago really help me great

Show More Reviews

See what our Experts say about this Timbren Vehicle Suspension

  • Size of the Bolts that Come with the Timbren Suspension Enhancement System TGMFK25S
    I checked with Timbren and the bolts that come with the Timbren part # TGMFK25S that you referenced are M10x1.5X30.
    view full answer...
  • Will Timbren Suspension Enhancement System Allow 2006 Chevrolet Truck To Sit Higher w/ Plow
    The Timbren Suspension Enhancement System, part # TGMFK25S, will prevent the front end of your 2006 Chevrolet Silverado truck from sagging so low when a plow is mounted to the front of the truck. This system is designed to work with suspensions that are in good working order. I have linked and FAQ and instructions for the Timbren Suspension Enhancement System, part # TGMFK25S. I have also linked a video installation of another model of the Timbren Suspension System, on a different vehicle...
    view full answer...
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  • Recommended Front Suspension Enhancement for 2002 Chevy Suburban 2WD 1500
    For the front suspension of your 2002 Suburban, I'd recommend the Timbren Aeon Springs, part # TGMFK25S. Installation is straightforward. You'd remove existing bump stops, and use the hardware and existing holes to instal the rubber Aeon spring. The springs get progressively stiffer as more weight is added to them, they typically come into play when a plow or some other very heavy piece of equipment is installed on the front of the vehicle. I'll link you to the installation instructions.
    view full answer...
  • Is Rear Timbren Suspension Enhancement System Available for 2004 Mitsubishi Montero
    I spoke with my contact at Timbren and the Rear Suspension Enhancement System for your 2004 Mitsubishi Montero is part # TGMFK25S. This system eliminates suspension sag, cushions road shock, reduces sway, and improves roll stability.
    view full answer...
  • Timbren Front Axle Suspension Kit # TGMFK25S for 2006 GMC Sierra 1500 SLT
    The Timbren front-axle jounce spring suspension kit you referenced, part # TGMFK25S, is a fit for both 2WD and 4WD versions of the 2004 Sierra 1500 SLT. These bolt-on without any drilling required (using included hardware) and replace the factory bump stops now on your truck. These and all other suspension enhancement products we offer are designed for use in vehicles whose suspension system is in good order. They are not intended to be an alternative to replacing a worn or damaged suspension....
    view full answer...
  • Is there a 12-Volt Accessory Circuit on the 7-way of a 2011 Ford F53 RV
    Yes, there is a 12 volt power source on the 7-way that is on your 2011 Ford F-53 RV. It will be on the 11:00 position of the connector as you look at the front of it. Check out the picture I attached that has a picture with all of the terminals of a 7-way labeled with their functions. You might want to test for voltage on this circuit with a Circuit Tester # 3808 as well just to be sure. I also attached an FAQ article on trailer wiring that you might find informative.
    view full answer...
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  • Suspension Enhancement Kits for 2003 Hummer H2
    Firestone Level-Rite Air Helper Springs and Shock Absorber Kit F1003 does NOT fit your 2003 Hummer H2 but all suspension enhancement products for this vehicle can be seen on the linked page. The front axle kit we have comes from Timbren and it a set of rubber jounce springs designed to support your front suspension when it is under load, such as when using a snow plow on the vehicle, kit # TGMFK25S. This no-drill kits includes rubber springs that provide progressive resistance when under...
    view full answer...
  • Recommended Suspension Enhancement for 2002 GMC Sierra 2500HD With Snow Plow
    For your 2002 GMC Sierra 2500HD, I recommend the Timbren Front Suspension Enhancement System # TGMFK25S to help prevent the sag you are experiencing when the snow plow is attached. These springs have a 14,000 lb capacity and are going to do a great job of providing you with the support you need on the front of your Sierra. The Timbren system will help bear the brunt of the load when your plow is attached so you can stay level. They are also remarkably well-reviewed by our customers who...
    view full answer...
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  • Longer Bolt For Timbren Spacers
    To add spacers to your Timbren system you are correct when you said you need longer bolts. The kit you're referencing uses a M10 x 30 x 1.5 GR 8.8 bolt to mount to the frame. So you need a bolt that is the same thread pitch, and hardness, but longer, the same as the size spacer you want to use. Since metric bolts use mm for length, there is a little bit of conversion. Roughly each inch will be 25mm. So for example, if you wanted a 1 inch spacer, you'll want to get a M10 x 55 x 1.5 GR 8.8...
    view full answer...
  • Suspension Enhancement System Recommendation for 2003 GMC Yukon 2 Wheel Drive
    When it comes to a suspension enhancement system for your 2 wheel drive 2003 GMC Yukon, you will want to go with the Timbren # TGMFK25S. This system uses hollow rubber springs to absorb the brunt of the force on the front of your vehicle which helps to reduce sag and sway for better handling, traction, and a smoother ride. Part # TGMFK25S, for 2 wheel drive, and part # TGMFK15A, for 4 wheel drive, differ in design and installation. The 2 wheel drive version is a bolt-on kit where as the...
    view full answer...
  • Front Timbren Kit Availability for a 2001 Chevy Suburban 4x4
    The part # TGMFK15A that you referenced will fit a 2001 Chevy Suburban 1500 4x4. If instead you have a 2500 model you would want the part # TGMFK25S. By nature these Timbren kits will not stiffen up the front suspension unless you have a decent load on the front of the truck. Unloaded you shouldn't notice them installed.
    view full answer...
  • Timbren Suspension Kits for 2004 Chevrolet Tahoe 2WD
    The jounce spring kit recommended for the front axle of your 2004 Chevrolet Tahoe 2WD is part # TGMFK25S. The kit you referenced, part # TGMFK15A, fits the front axle of the 4WD version that does not have the police package. All front and rear suspension enhancement kits for your 2WD Tahoe, including jounce springs, air bag kits and coil helper springs, are shown on the linked page.
    view full answer...
  • Timbren Suspension Kits for 2000 Chevy Silverado 1500
    We have both front axle and rear axle Timbren rubber spring suspension enhancement kits for your 2000 Chevy Silverado 1500 that are displayed on the linked page. You can also see other kit options including air bags. For a rear axle Timbren kit you can use # TGMRCK15S which fits both 2WD and 4WD models. If you are interested in a front axle kit too, in case you use a snowplow for example, you can use Timbren kit # TGMFK25S for 2WD or kit # TGMFK15A for 4WD (if the truck is a 2-door model).
    view full answer...
  • Recommended Suspension Enhancement Kits for 2001 Suburban 2500 with AutoRide Leveling System
    The AutoRide self-leveling and damping suspension system in your 2001 Suburban 2500 uses various sensors in the vehicle to control a compressor pump that continuously varies shock damping while driving. This system cannot be defeated and aftermarket air springs like the Firestone Ride-Rite cannot be installed on the vehicle according to my contact at Firestone. However, you can install a set of rubber jounce spring such as the Timbren front-axle kit # TGMFK25S and rear-axle kit # TGMRSB4S....
    view full answer...
  • 2004 GMC Yukon Timbren Suspension Kit Recommendation for Front and Rear Axle
    For your 2004 GMC Yukon XL we have the Timbren suspension kit part # TGMFK25S which fits the front suspension and then the part # TGMRSB4S which fits the rear. Both of these kits act like bump stops except are much larger to make contact sooner than the standard bump stop so that they can provide additional suspension support.
    view full answer...
  • Timbren Rear Suspension Enhancement For a 1999 Chevrolet 3500 2WD Dually
    The Timbren Suspension Enhancement Springs, # TGMFK25S, that you referenced will fit your 1999 Chevrolet 3500 2WD dually, but these springs were designed for service vehicles such as tow trucks. Keep in mind, these springs are designed for the front axle, not the rear. It would be better to use Timbren springs on your rear axle when carrying your camper. For your truck, I recommend the Timbren Rear Suspension Enhancement Springs, # TGMRCK35. Adding a set of Timbren springs to your truck...
    view full answer...
  • Suspension Enhancement Recommendation for a 2000 GMC Truck that Acts and Anti-Sway As Well
    We have the perfect product for you. The SuperSprings helper springs part # SSA13 will give your rear suspension 5,000 total lbs of support and will greatly reduce the amount of sway on your truck. A coworker of mine installed these on his vehicle and said that along with the suspension support he was surprised by how well these worked as an anti-sway device.
    view full answer...
  • Rear Suspension Enhancement Recommendation for 2003 GMC Sierra with Quadrasteer
    I spoke with my contact at Firestone about whether or not the Ride-Rite Air Helper Springs, # F2190, will fit your 2003 GMC Sierra with Quadrasteer. He stated that none of the Ride-Rite kits would work on your specific vehicle. But not to worry, there is another option. I then spoke with my contact at Timbren, another maker of suspension kits. He stated that there was a kit available for your truck. Take a look at Timbren Rear Suspension Enhancement System, # TGMFK25S. These are an easy...
    view full answer...
  • Suspension Enhancement Recommendation for 2002 GMC Sierra with Quadrasteer
    I spoke with my contact at Firestone about whether or not the Ride-Rite Air Helper Springs, # F2190, will fit your 2003 GMC Sierra with Quadrasteer. He stated that none of the Ride-Rite kits would work on your specific vehicle. But not to worry, there is another option. I then spoke with my contact at Timbren, another maker of suspension kits. He stated that there was a kit available for your truck. Take a look at Timbren Rear Suspension Enhancement System, # TGMFK25S. These are an easy...
    view full answer...
  • Suspension Enhancement Recommendation for 2004 Chevy Tahoe
    Timbrens are going to be what I would recommend for your 2004 Chevy Tahoe. They are better suited for heavier duty applications like what you have so for that the # TGMRYS4 would be what you would want for your 2004 Chevy Tahoe. I attached an install video for you to check out as well. For the front you would want the Timbren kit part # TGMFK25S.
    view full answer...
  • Recommended Front and Rear Suspension Enhancement for 2006 GMC Sierra 3500
    I recommend Firestone Ride-Rite Air Helper Springs # F2250 for suspension enhancement for your 2006 GMC Sierra 3500. These will perform better than Timbrens or SumoSprings because of their adjustability. For the front suspension, you could go with Timbrens # TGMFK25S.
    view full answer...
  • Suspension Enhancement that Fits 2004 Mitsubishi Montero Limited
    If you have a 2004 Mitsubishi Montero Limited non-sport you'd need the Timbren kit # TGMFK25S or if you have a Sport Limited model you'd need the part # AL60747.
    view full answer...
  • Front-Mounted Hitch Receiver for 1999 Chevrolet Silverado 1500
    Draw-Tite front-mount hitch # 65028 fits the 2500 series pickups for year 1999, but for your 1500 series you'll use Draw-Tite's front-mount hitch # 65023. If you prefer a no-drill installation then instead you can use Curt's # 31302. These are the two options for your truck. If you'll be using the hitch to support a heavy load such as a snowplow or cargo carrier, you might want to consider some front-end suspension support. Timbren jounce spring kit # TGMFK25S works on 2WD models and kit...
    view full answer...
  • Rubber Jounce Spring Suspension Kit for 2006 Chevrolet 3500 2WD Flat Bed Work Truck
    If you want a suspension helper spring kit that avoids the complication of air springs, then I suggest a rubber jounce spring kit from Timbren. We offer both front- and rear-axle kits for your 2006 Silverado 3500 2WD flat bed work truck. The rear axle kit I recommend is the Timbren # TGMRTT35C which is intended for heavy-duty vehicles. This is a bolt-on kit that requires no drilling. If you want a front-axle kit I suggest Timbren # TGMFK25S, also a no-drill install. The linked article...
    view full answer...

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