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When a heavy trailer or bed load makes the rear sag and the steering feel light, this system steps in with real mechanical support. The RoadActive Suspension Custom Leaf Spring Enhancement Kit adds up to 2,000 lbs of load-leveling capacity by turning your stock leaf springs into a mechanically active setup. The variable-rated coil tension springs automatically adjust to your load, keeping the rear end level and restoring traction for steady braking and acceleration.

This kit doesn’t just stiffen your suspension—it adapts. The variable-rated coil tension springs instantly activate when weight is added, then disengage when unloaded so your ride stays comfortable. That means you get solid support under a trailer or full bed without the harshness when driving empty. The tension can even be fine-tuned during installation to match your towing or hauling needs.

Hauling heavy often means fighting sway and bounce on curves or rough roads. This system strengthens your leaf springs to help eliminate axle wrap, wheel hop, and body roll before they start. It keeps your truck planted on corners and helps prevent that back-and-forth rocking you feel in wind or when a semi passes. The result is more control and less fatigue behind the wheel.

No drilling, cutting, or welding needed here. Each unit bolts on top of the leaf spring and under the U-bolt plate using the included hardware. Everything comes fully assembled so you can bolt it up with basic tools. Once installed, there’s nothing to adjust or maintain—just dependable support every time you haul or tow.
Durability matters when your suspension works this hard. Each component is made from high-grade alloy steel with an epoxy e-coat for corrosion resistance. The end brackets have a salt spray rating of more than 800 hours, so they hold up against road grime and weather while protecting your investment mile after mile.

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Hi, everybody. Andy here with etrailer.com. And today we're gonna take a look at the Roadmaster Active Suspension custom leaf spring enhancement kit. Now this is a custom fit part, and it is designed to fit the 1986 to 1995 Toyota pickups, the 1995 to 1997 Toyota Tacoma, and the 1998 to 2004 Toyota Tacoma excluding the pre-runner. Now to confirm if these are going to work for your vehicle, take advantage of our vehicle fit guide and input the year, make, and model of your vehicle and our fit guide will let you know if these will work for your vehicle. Now when towing or hauling a heavy load, you may encounter a number of problems that can make your driving experience difficult or dangerous.
Such as sway, body roll, or bottoming out. When your vehicle is weighted down, your factory leaf springs can't counteract these problems to the extent that they're supposed to. The weight will overpower the leaf springs and cause them to twist or flatten out. When that happens, they cannot support, level, or stabilize your vehicle effectively. Additionally because your factory leaf springs are passive, they won't begin to tackle problems such as sway until those problems have already started.
Now this kit will convert your vehicle's factory leaf springs into a mechanically active suspension system. It'll actively strengthen the leaf springs for improved ride quality with or without a load. And this all in one suspension system will improve stability, handling, and control. It will eliminate axle wrap, wheel hop, and bottoming out, and it will reduce dangerous sway and body roll when you're cornering. And it will even keep your ride level when you're towing or hauling a heavy load, improving your traction while breaking and accelerating.
It does use these variable rated coil tension springs, which will automatically adjust your vehicle's load. They activate immediately to support the extra weight, and they'll disengage when unloaded, allowing your leaf springs to perform as intended. They can be adjusted during installation to accommodate your towing or hauling needs, and they're independently adjustable for side to side leveling of any off center loads. These will help extend the life of your leaf springs, your shock absorbers, and your shackles, and even your tires. They are made in the USA and are constructed of a durable epoxy coated steel.
And the corrosion resistant brackets on the ends of each of these units have a salt spray rating of more than 800 hours. This is an easy bolt on installation so there's no drilling, no cutting, or welding required. This I bracket will wrap around the top of the factory leaf spring eye, and then the unit will secure under the leaf spring and around the factory U bolts. They arrive as you see them. Fully assembled, and the hardware is included. And these are maintenance free. Adjustments and monitoring aren't needed once they're installed. The weight capacity is 2,000 pounds. However, it is important to note that this kit will not increase your vehicle's weight carrying capacity. Well, that's gonna conclude our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me..
Ratings & Reviews

John
9/14/2026
Well It has not failed me yet. Being basically a spring under load all the time I am assuming the spring will stretch some over time and I will have to adjust tension accordingly. The pickup sits nicely on the thinner washer setting so I am leaving it there and hopefully that will help the system last longer.

Brooke M.
6/25/2025
Looks great, Les :) I hear lots of good this about this option for suspension enhancement and how you said, even without towing it can improve the ride quality. Glad to know that you are happy with them, too! do you have any upcoming camping trips planned?

Gwendolyn Y.
7/23/2025
That's a long trek, so I'm glad these helped you along the way! Do you take that trip often, Elden?

Sergio J.
8/13/2021
What can I say. After a year of constantly driving through Texas roads and highways. I have moved twice and loaded the bed of my truck plus U-Haul 6x12 trailer and thy truck has not felt the load of it. The Active Road Suspension Leaf Spring is constantly sort of speak sensing if theres load so it can actively push it upwards. I have even driven up to the crazy roads of Pennsylvania and my pick drives smoother than when I got it from the dealer. Im telling you these things work. As any cautious driver upkeeping his own vehicle, I have periodically checked the bolts and location of the resistance in between the spring and it has not deflected or moved from its original installation. I believe every pick up must have these. It beats constantly putting air on the air bags especially in inclement weather like up here in Pennsylvania with the snow. I couldnt be more satisfied with this purchase. Thank you etrailer for offering this superb product.

Sergio J.
8/16/2021
Just like when I bought it.

Miguel
7/10/2022
Its been working very well i loaded a couple of times and its awesome

Rick M.
3/27/2022
After a year I am still pleased with this product. I had been adjusting the spring tension higher when towing and then back down after a trailering trip, but now just leave it adjusted to the trailer towing tension as the unloaded ride doesnt seem to suffer when the springs are tighter.

Rich
3/10/2021
Still working great. Towed a Flaggstaff microlite 23LB Travel trailer prob between 5 and 5500 LB’s to Niagra Falls with no problems, truck sat level with trailer and 2 adults,2kids. Getting ready to make a 2,000 mile round trip to disney in florida in a few weeks.

William
3/30/2021
Makes the ride a little stiffer but its a truck. Great when pulling my 37 camper. Helps out a lot!!!!

Russell
9/2/2023
OMG!! I have done extensive traveling with my trailer over the last year and the RAS system has made a huge difference in sway, road buffeting and squat. I can’t imagine not having this on any vehicle that tows!

Michael
7/7/2023
Removed the Suspension Enhancement and installed Airlift. Cost more but rear-end isnt sagging 4.
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Mike L.
6/23/2026
Nicely done, Sam! Thanks for the photos, we always appreciate those!