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  1. Vehicle Suspension
  2. Timbren
  3. Bump Stops
  4. Towing/Load Leveling
  5. Front Axle Suspension Enhancement
  6. Extra Heavy Duty
THIS ITEM IS NOT A FIT FOR
2020 Ford Ranger
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Timbren

Timbren Front Suspension Enhancement System

Part Number: TTOFTUN4
In Stock
$269.36
Retail:$316.90
You Save: $47.54
Vehicle Suspension
Not Confirmed to Fit

2020 Ford Ranger

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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 TTOFTUN4 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (753)
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Timbren Vehicle Suspension - TTOFTUN4

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 14,000-lb Front Load Support: Keeps your vehicle level and stable when carrying heavy front loads.
  • Better Steering and Braking: Prevents front-end sag so handling, traction, and headlights stay aligned.
  • Smoother, Safer Ride: Hollow rubber springs absorb road shock and reduce bounce on rough roads.
  • Independent Side Support: Each spring cushions one side to cut body roll and balance off-center loads.
  • Quick DIY Install: Bolts in place of bump stops with custom brackets—no drilling or air lines needed.

Features to know about

Stay Level and Confident Under Front-End Load: 14,000-lb Capacity Support

When heavy gear or attachments weigh down the front end, steering and braking can feel unpredictable. The Timbren Front Suspension Enhancement System uses hollow rubber springs with a 14,000-lb capacity to keep your ride level and stable. These springs work with your stock suspension to resist sag and maintain proper headlight aim, even with weight up front. The result is steadier handling, better traction, and a safer drive when things get heavy.

Truck with snowplow attached showing front-end leveling support from Timbren front suspension enhancement system

Truck with fully loaded bed showing reduced front axle sag using Timbren front suspension enhancement system

Smooth Out Rough Roads: Progressive Rubber Spring Design

Bumps and uneven pavement don’t have to beat up your suspension. Each Aeon rubber spring compresses progressively—soft at first for comfort, then stiffening as the load increases. This design cushions light loads but firms up under pressure to absorb road shock and prevent bottoming out. You’ll notice a smoother ride when loaded and less wear on your factory suspension over time.

Empty pickup truck on rough road showing road shock without Timbren suspension enhancement system

Control Sway and Off-Center Loads: Independent Spring Action

When you swerve to avoid a pothole or travel with an uneven load, each Timbren spring reacts on its own to keep you steady. This independent action helps reduce body roll in turns and compensates for side-to-side weight differences. The truck feels planted through corners and steady on uneven ground, even when one side carries more weight than the other.

Timbren suspension diagram illustrating prevention of body roll, sway, and squat during turns or uneven loads

Install It Yourself and Hit the Road Sooner: Bolt-On Brackets, No Drilling

You don’t need a lift or air system to add serious front-end support. The Timbren kit includes vehicle-specific brackets and hardware that bolt directly in place of the factory bump stops—no drilling required. Once installed, the springs are always ready to work with your existing suspension, providing extra support automatically without compressors, airlines, or manual adjustments.

Specs

Included Components

  • Includes: 2 Aeon hollow rubber springs, vehicle-specific brackets and hardware for simple installation
  • Replaces: axle bump stops on frame

Installation diagram showing Timbren hollow rubber springs mounted above front axle in loaded and unloaded conditions

Cutaway animation showing compression stages of a Timbren hollow rubber spring under load

Installation

  • Drilling Required: No drilling required

Weight and Capacity

  • Capacity: 14,000 lbs

Compatibility

  • Designed to work with: a suspension system that is in good working order

Warranty

  • Warranty: Limited lifetime warranty - satisfaction guarantee

TOFTUN4 - Front Suspension Enhancement System with Aeon Hollow Rubber Springs by Timbren

Installation Details TTOFTUN4 Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:

Ratings & Reviews

4.7

753 reviews
Review sort icon
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.

by:

Simply amazing the ride is smooth no more banging noise !!



by:

These Work Great!



by:

Excellent product



by:

Came in their own professional looking manufacturer retail product box just as I was expecting.



by:

Steve profile picture

Steve

12/22/2024

works just like when installed. Handles the weight of plow great.



by:

very firm, solid, I am very happy for having purchased this product I really recommend it. Tony Arias, Houston Texas.



by:

Helps tremendously when hauling!
Surprisingly,
it smooths out bumps with no load. I'm very happy with my purchase!



by:

Not too difficult to install and do what they are supposed to do. Good product.



by:

Awesome service.



by:

Super easy to install. Installed it to my 2024 Tundra. looking to see to improve my travel trailing towing experience.



by:

I have both the front and rear Timbres Suspension Enhacement Systems installed on my truck



by:

Jack the truck up; simple to install, I used thread lock (red) for safety. The only problem I had was the lower control arm of my '12 Tacoma obstructed my the use a 8 mm hex wrench to tighten it past hand tight.



by:

Work great with a little extra weight on the front end. Easy to install... out with the old in with the new.

I have to say that e-trailer has the best customer service I have ever experienced buying on line. From the time I ordered they kept me updated on the status and that made the experiance worth it.



by:

Shipping was very quick. Install couldn't be any easier. Remove old bump stops and thread these in place. Great product.



by:

Realized that this install will be difficult, after ordering. No online tutorials for the 2nd-gen Tacomas on how to actually get at the bolt that holds the stock unit in place. I can barely feel it. let alone get a socket on it. I suppose if I had a lift it might be easier, but it would have been nice to have some warning about this. I also ordered the rear units and they are straightforward with plenty of videos.

I'm sure I will eventually get this on somehow, maybe by hiring my local garage. Argh.



by:

This company E Trailer is great and they kept me inform regarding the status of my front and back Timbren System for my 2013 Toyota Tundra 4 x4 Dublecab . The product was delivered and it looks great . Tomorrow I take it to a mechanic for Instal .



by:

PERFECT FIT, took no time to install these babbies, a great suspension addition along with a front hitch/5k superwinch all from etrailer.
Thankyou George & Patrick



by:

After towing with the TIMBREN SES system installed, I wouldn't tow any other way. I've installed these on (2) SUVs, and (2) pick ups, over the last few years and have always been impressed with the performance.



by:

My 2019 Tacoma’s ride was a total joke until I installed the Timbren’s on my front and rear suspension. The truck rides a 100 percent better after installing the Timbren system. It was extremely easy to install. I highly recommend this product.



by:

I installed front and rear suspension upgrades on a 2012 tundra. It made a world of improvement. While the Tundra has extreme power and a great ride it was too soft for the towing that I was doing. I would have to compare it after the Timbren upgrade to a well built one ton.
It was by far money well spent and an outstanding upgrade with great performance. I would and have recommended these Timbren upgrades to anyone needing suspension improvements. By far a great bang for your dollars spent.



by:

These are an awesome suspension up grade. Great for beefing up a half ton. I installed front and rear timbrens on my 02 tundra and im carrying 2000 lbs. Level, no suspension sag and have had 2800 lbs on still handled ok with no droop. Down side is they ride really rough if you do alot of dirt road / off-road driving. I don't recommend those load weiights with 6 ply tires move up to 10 ply.



by:

Easy install, still pending a towing te st



by:

Easy install



by:

they seem fine I haven't put the snowplow on yet



by:

Ok it’s been a year since I’ve had the springs and I’m impressed. With how easy the install is and what you get out of it these are truly amazing. No more “squishy” feeling when towing my 22fy travel trailer. The ride is a little bumpy but I don’t care. I’m glad I found these.

Gabriel profile picture

Gabriel

2/23/2026

Still going strong. The ride is a little bumpy but when I tow the truck doesn’t feel “squishy” whenever I make my turns. I’m still super happy about the product.


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See what our Experts say about this Timbren Vehicle Suspension

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    Hello Edward, Great choice on the Timbrens for the rear. Since all of your weight is in the rear of the truck I do not think that it is necessary to put them on the front, even with hauling a 7,000 pound trailer. All of the focus is on the tongue weight which is what pulls the rear of your truck down. Now if you were thinking of installing a winch, using a snow plow, or any heavy accessory on the front of the vehicle, then you would want to add the Timbren Front Suspension Enhancement...
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  • How to Install the Timbren Front Suspension Enhancement System on a 2016 Toyota Tundra
    Hey Karl, welcome back. You don't have to install the # 3 nut unless you're mounting the Timbren Front Suspension Enhancement System item # TTOFTUN4 to the bottom like the 1st picture. Ideally the spring just threads into the upper weld nut on your 2016 Toyota Tundra. Are you able to use the factory weld nuts?
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  • Timbren Suspension Enhancement Options For A 2023 Toyota Tundra TRD PRO
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  • Differences Between Detail K2 and Detail K2 Elite Snow Plows For a 2003 Toyota Tacoma
    Yes, the difference between the Detail K2 Snowplow # K2AVAL8422 and Detail K2 Elite Snowplow # K2AVAL8422ELT is the Elite has the electric actuator over the winch. The Elite also uses a chain connection to the blade while the basic K2 has a strap that is more likely to become damaged. The electric actuator is superior to the winch. It operates faster, smoother and it has a built in clutch that will protect against damage that a winch would cause. The actuator won't be able to lift the blade...
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  • Why is One Set of Front Timbren SES # TTOFTUN4 Installed on a 2005 Toyota Tundra w/ 4 Bump Stops
    If you check out the linked installation details for the Timbren Front Suspension Enhancement System # TTOFTUN4 that you referenced you will note that they say to remove the rearmost bump stop (for the front suspension). You will not be replacing all 4 of them, only 2. This is because there is only room for one upgraded bump stop. Please note that any suspension enhancement will not increase the weight capacity of your 2005 Toyota Tundra. It is only meant to support a suspension that is...
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  • Comparing Timbren Suspension Enhancement for 2018 Toyota Tacoma
    There are six different Timbren kits for suspension enhancement that all fit your 2018 Toyota Tacoma. Four are for the rear and two are for the front. Of the front two, part # TTOFTUN4 is designed for adding support when you put a snow plow on the truck and # TABSTOF is an active bump stop that cushions the shock when off-roading. A couple of the rear kits are designed to support the rear of the truck when either towing a trailer or adding weight in the bed. Use part # TTORTUN4 if your...
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  • Where Does Front Timbren Suspension Enhancement Install on a 2010 Toyota Tundra
    The Timbren Front Suspension Enhancement System, part # TTOFTUN4, mounts where your factory bump stops are mounted. To install part # TTOFTUN4, you will have to remove the factory bump stops and replace with the Timbren System. I attached a picture that shows which bump stop to use in relation to the front struts.
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    The rear-mount trailer hitch I recommend for your 2018 Tacoma is the Curt # C13264 which offers a substantial 6K towing capacity and 1050-lb tongue weight rating. This hitch is a simple no-drill bolt on install as shown in the linked video and the photo shows the clean appearance. It is a perfect match for the Taco's 6400-lb towing capacity. If you need 4-pole trailer wiring order part # C56349 or for 7-way wiring order part # 22117. Both plug in at your Taco's taillights. For a front...
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  • Front-Mounted Hitch Receiver for 2017 Toyota Tundra 4X4
    We can offer you a choice of two 2-inch front-mounted hitches for your 2017 Toyota Tundra. You can see both the Curt and Draw-Tite options by clicking on the link provided. Both Curt hitch # 31198 and Draw-Tite hitch # 65080 share 500-lb vertical load and 9000-lb line pull ratings. Both are no-drill installations using included hardware. The Curt has the advantage on price so I suggest this one over the Draw-Tite. Installation instructions are linked for you. If you plan to use a snowplow...
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  • Suspension Enhancement Recommendation for 2016 Toyota Tundra 4WD Towing Trailer
    I have a really great solution to give you additional suspension support and will also improve the ride quality and handling the RAS systems like the part # RAS34FR that fits your 2016 Toyota Tundra. I wouldn't recommend front suspension enhancement for your setup. That would most likely actually make the ride quality harsher. Any of the other rear suspension enhancement options would also make the ride quality a bit rougher as well so that's why I would not recommend them for you.
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  • Recommended Timbren Front Suspension Enhancement System For a 2017 Toyota Tundra With Snow Plow
    I recommend the Timbren Front Suspension Enhancement System # TTOFTUN4 for your 2017 Toyota Tundra with a snow plow. You may see a slight rise in your suspension depending on the condition of your springs. The Timbren springs will be in contact with little to no gap in the suspension when at normal ride height. These springs are rated for a capacity of 14,000lbs. While your Tundra will not come close to that amount of weight it provides additional support to your springs to reduce sag...
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  • Recommended Detail K2 Snow Plow and Custom Mount for a 2017 Toyota Tundra
    The Detail K2 Snowplow and Custom Mounting Bracket Kit for Detail K2 Snowplows that I recommend for a 2017 Toyota Tundra is the Storm II part # K2STOR8422 and Storm II Brackets part # K285113. The Storm II is an excellent option because it has a very large 84" wide blade for increased plowing capability, a 3 position adjustable blade for full control of the plow, and a wireless in-cab controller for ease of use. The Storm II Brackets are a custom bolt-on fit for the Tundra so no drilling...
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  • Can Just Front Axle Timbren Kit be Installed on 2011 Toyota Tundra
    Yes, you can install Timbrens on the front axle of your 2011 Toyota Tundra that you plan to use to plow with. For that we have the # TTOFTUN4 that you referenced which would fit and work well.
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  • Front Suspension Enhancement System While Using a Snow Plow for a 2021 Toyota Tundra
    We have a suspension system that is designed exactly for your application and it will level out the front end on your 2021 Toyota Tundra. It is the Timbren Front Suspension Enhancement System item # TTOFTUN4. These 14,000 lbs capacity Aeon hollow rubber springs act as shock absorbers. They are great for trucks with plows, these front hollow rubber springs help to stabilize and level your Toyota Tundra. They also provide a more comfortable ride by absorbing road shock and improving roll...
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  • Does 2007 Toyota Tundra Need Suspension Replaced When Installing Suspension Enhancement
    If the suspension is in good working order then you would not need to replace it, but you should note that our suspension kits do require suspension on the vehicle to be in perfect working order and cannot be used as a band aid for worn out components. The part # TTOFTUN4 is a fit for your front axle and then the part # F2445 is a fit for the rear.
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  • Mounting Kit Required to Install Detail K2 Rampage II Snowplow K2RAMP8219 on 1999 Toyota Tacoma 4X4
    To mount the Detail K2 Rampage II Snowplow # K2RAMP8219 on your 1999 Toyota Tacoma 4X4 you will need the appropriate installation kit. That bracket kit part is # K285120. Very often trucks that have a snow plow installed will benefit from some front-end suspension support to help offset the load from the plow's weight. Since the Rampage weighs in at 265-lbs you will certainly notice the stability benefits from a set of front jounce springs. A kit like Timbren's # TTOFTUN4 will bolt on...
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  • Differences Between Timbren Suspension Enhancement TTORTUN4 and TTOFTUN4, 2010 Toyota Tundra
    Basically, the Timbren Springs you have referenced, # TTOFTUN4, are for the front suspension. The 6,000 pound system, # TTORTUN4, is for the rear suspension. Installing Timbren suspension enhancement will have very little to no effect on the unloaded ride quality. I have included links to the installation details for both sets for you.
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  • What Air Lift Suspension Products Fit 2005 Toyota Tacoma 4X4 TRD
    Your 2005 Toyota Tacoma 4X4 TRD (non-Pre-Runner) double-cab pickup can be fitted with both front-axle and rear-axle suspension enhancement products. For example, if you regularly use a snow plow or front-mounted winch you can use Timbren front suspension jounce springs # TTOFTUN4. These offer no-drilling bolt-on installation and replace the axle bump stops on the truck frame to provide progressive resistance under load, but do not otherwise affect the ride of the vehicle. For rear-axle...
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  • Will Timbren Suspension Enhancement Reduce Wear on Shocks on a 2001 Toyota Tundra
    Timbren systems are designed to absorb road shock which does increase the life of the factory suspension. You will want to first make sure that the suspension is in good working order before installing and using the Front Suspension system, # TTOFTUN4. You can see in the instructions I have linked for you how the system will be effective in taking up the shock based on its position. The Timbren system has a limited lifetime warranty so I would not worry about the longevity of the product....
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  • Will Timbren Suspension Enhancement for a 2014 Toyota Tacoma Add Additional Ride Height
    The Timbren kit part # TTOFTUN4 is not designed to provide your 2014 Toyota Tacoma with additional suspension height. It will help prevent sag when the vehicle is loaded but otherwise the ride height would not be increased.
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  • Where To Mount Timbren Front Suspension Enhancement System # TTOFTUN4 on 2005 Toyota Land Cruiser
    The Timbren Front Suspension Enhancement System, part # TTOFTUN4, mounts where your factory bump stops are mounted. To install part # TTOFTUN4, you will have to remove the factory bump stops and replace with the Timbren System. To remove the factory bump stops, it may be a good idea to use penetrating oil if you have a hard time getting the bump stops loose. I have linked instructions for the Timbren Front Suspension Enhancement System, part # TTOFTUN4.
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  • Front Helper Springs for a 1999 Toyota Land Cruiser
    Yes the Timbren helper springs, # TTOFTUN4, will work well to keep the front of your 1999 Toyota Land Cruiser from sagging. But if you are having problems because the front suspension is worn you will want to fix that first because suspension enhancement is meant to be used with stock suspension that is in good working order. Then using the Timbren springs will prolong the life of the vehicle suspension. I have linked the instructions and a help article on Timbren suspension for you.
    view full answer...
  • Recommended Front Suspension Enhancement Product for 2000 Toyota Tundra
    For the front suspension of your 2000 Toyota Tundra, I would recommend the Timbren # TTOFTUN4. The Timbren Aeon hollow rubber springs help eliminate front end sag caused by snow plows or other heavy front end loads. The Timbren system is designed to replace the factory bump stops. Unfortunately, Firestone does not have a similar item compatible with your truck. I have linked you to an FAQ article that contains additional information about Timbren Suspension Enhancement products.
    view full answer...

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