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  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs and Helper Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Standard Duty
THIS ITEM IS NOT A FIT FOR
1990 Audi V8
etrailer Installation
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RAS

RoadActive Suspension Custom Leaf Spring Enhancement Kit

Part Number: RAS4611-DV
In Stock
$539.00
Vehicle Suspension
Not Confirmed to Fit

1990 Audi V8

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etrailer Installation
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2,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway. Great Prices for the best vehicle suspension from RAS. RoadActive Suspension Custom Leaf Spring Enhancement Kit part number RAS4611-DV can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (544)
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  • Videos (1)
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RAS Vehicle Suspension - RAS4611-DV

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 2,000-lb Load Support: Levels your ride so steering and braking feel steady under heavy weight.
  • More Stability and Control: Reduces sway, body roll, and bounce for safer towing and hauling.
  • Instant Load Response: Springs engage right away to stop sag and squat before they start.
  • Protects Suspension Life: Less strain on shocks, tires, and leaf springs for longer service.
  • No-Maintenance Setup: Bolt-on design needs no air lines or upkeep once installed.
Made in USA

Features to know about

Stay Level and Confident Under Load: 2,000-lb Rear Suspension Support

Heavy trailers and bed loads can make the rear end sag and throw off steering and braking. The RoadActive Suspension Custom Leaf Spring Enhancement Kit adds up to 2,000 lbs of load support by converting your factory leaf springs into a mechanically active suspension system. Its variable-rated coil tension springs automatically adjust to your load to keep your ride level, stable, and under control whether you’re towing or hauling.

Vehicle equipped with RoadActive Suspension showing level ride height under heavy load for improved traction and stability.

Smooth Ride, Empty or Loaded: Variable-Rated Coil Tension Springs

Factory leaf springs wait until the weight hits before reacting, which can mean bottoming out or sway once you’re already leaning. This system reacts instantly. The variable-rated coil springs engage as soon as weight is applied, strengthening your leaf springs to prevent flattening and sag. When unloaded, the coils disengage so ride quality stays comfortable and compliant, not stiff or harsh.

Close-up view of RoadActive Suspension coil tension spring showing variable-rated design for load adjustment.

Stay Steady Through Corners and Crosswinds: Active Sway and Roll Control

Body roll and sway can make towing or hauling feel unstable through turns or in windy conditions. By reinforcing the leaf springs, this kit stops sway and body roll before it starts. It keeps your load planted when cornering or when large vehicles pass by, cutting down on that rocking motion that wears you out on long drives.

Protect Your Suspension Components: Durable, Maintenance-Free Design

Axle wrap and wheel hop put stress on shocks, shackles, and tires over time. This kit stabilizes the axle under heavy load and eliminates those issues by absorbing the extra force before it reaches other parts of the suspension. The epoxy e-coated alloy steel construction resists corrosion with brackets rated for more than 800 hours of salt spray testing. Once installed with the included hardware—no drilling, cutting, or welding required—it’s completely maintenance-free.

RoadActive Suspension system installed on vehicle rear axle showing how it prevents axle wrap and wheel hop by stabilizing the leaf springs.

Fully installed RoadActive Suspension unit mounted under vehicle leaf spring showing bolt-on installation.

Close-up of RoadActive Suspension steel coil spring with corrosion-resistant epoxy e-coating and durable metal brackets.

Specs

Weight and Capacity

  • Weight capacity: 2,000 lbs

Labeled diagram of RoadActive Suspension installation showing components attached to vehicle leaf spring assembly.

Warranty

  • Warranty: 5-Year warranty
  • Money-back guarantee: 30-Day money-back guarantee

4611-DV RAS Custom Active Suspension System for OEM Leaf Springs - Rear Axle



This Product Fits The Following Vehicles




Video of RoadActive Suspension Custom Leaf Spring Enhancement Kit
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Ultimate Overview of the RoadActive Suspension Custom Leaf Spring Enhancement Kit-RAS4611-DV

Hello everybody. This is [email protected]. Today, we're going to take a look at this Roadmaster active suspension custom leaf spring enhancement kit. Now this is a custom fit part. It is designed to fit the 1998 to 2003 Dodge 1500, 2500, and 3500 vans. And on a custom fit part like this, I always like to recommend for you to go to our website, use the fit guide, put in your year and model vehicle, and it'll show you if this'll work for your application.

Now, this custom 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 it is a nice all-in-one suspension system that'll improve stability, handling, and control. It does eliminate axle wrap, wheel hop, bottoming out. It'll will dangerous sway and body roll when you're cornering.

It will even keep your ride level when you're towing or hauling a heavy load. Will improve your traction while braking and accelerating.It does use the variable rated coil tension springs, which will automatically adjust to your vehicle's load. They do activate immediately to support the extra weight, and they'll disengage when unloaded allowing your leaf springs to perform as intended. The customizable coil springs can be adjusted during installation to accommodate your towing or hauling needs, and they are 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, shackles, and even your tires.

They are a nice durable epoxy e-coated steel construction. The corrosion resistant brackets on the ends of each unit have a nice salt spray rating of more than $800. And it is an easy bolt on installation. There's no drilling, cutting, or welding required. Basically this I-hook 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.When you do receive them, it comes just like this, all fully assembled and the hardware's all included.

It is maintenance free. The adjustments and monitoring aren't needed once they're done after you install it. And this part is made in the USA. A few specs on it. The weight capacity is 2000 pounds. The thing you do want to remember is that this Roadmaster active suspension will not increase your vehicle's weight carrying capacity. But that should do it for the review on this Roadmaster active suspension custom leaf spring enhancement kit.

Ratings & Reviews

4.7

544 reviews
Review sort icon
2,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway.

by:

Made all the difference in the world! Also, easy to install. Yes, the ride is stiffer, but when I'm dragging the 10K of weight in the trailer, it's worth it.



by:

Easy install when I rotated tires. Forgot to measure height difference, but it did raise a bit. I like the adjustability and not having to remove springs and shackles to add a leaf. Will be towing the camper with improved support.



by:

I Have had this suspension on multiple trucks and i love it . It takes the sway out of the truck when entering a exit ramp and taking sharp turns with a trailer or without, also reduces wheel hop and increases payload in the bed of the truck.I would recommend for all trucks pulling trailers.



by:

Overall, very happy with the product. GMC didn't have any way to improve the truck from squatting when I hooked up my trailer. This kit didn't stop the squatting but significantly reduced the bounce on bad dips in roads, bridge/road transitions and bad railroad crossings.



by:

Hands down the engineering behind the product was well executed and would recommend it to anyone who's travels involve pulling any type of trailer. You will feel a much smoother ride even when not pulling a trailer at all.



by:

I received this kit in a very timely manner always do from etrailer have some issues with the instructions that come from roadmaster not a trailer the bump stop spacer didn’t say that you need to use the original bolt from the bump stop so it slowed me down greatly on the install however I took it out on a quick run without a load I do feel that this has made the unloaded ride smoother tomorrow I’ll be taking the trailer out for a bit and we’ll see how it works there and I’ll update this rating.



by:

I found this items cheaper on another site but etrailer match and then beat the price.
Item installed super easy, more work jacking up the truck and taking the tires off. Can be installed with out removing tires just make it easier to get it in. The item did lift the back of my truck 1 inch. See Pics.



by:

Easy install 2011 Tacoma crewcab long bed. Helped with sag when towing microlite travel trailer. Keeps the rear end raised in the rear a little when unloaded, but I like that look. Only complaint and its nothing big when truck is unhooked and empty when i get out I can hear alittle noise from RAS. Sort of like a bedspring coil. Night pic is with RAS installed daylight pic is with out installed



by:

I’ve bought a lot of products from etrailer and as always everyone I dealt with is professional and knowledgeable of the numerous products they sale. I used every resource they offer to help me decide what type of suspension upgrade I was going to use to improve the haul and tow ability of my 2017 diesel chevy Colorado 4x4 crew cab short bed. I chose the RAS system from Roadmaster. I also called them and ask some very detailed questions about using my OEM shackle instead of replacing with the plates in the kit and was told that was fine and that others had also. I got professional and knowledgeable info that helped make my decision. The product is exactly as promoted and every review out there on the internet about how good or unchanged the unloaded ride is after installing are true. My truck rides better now and it was already quieter and almost as smooth as my wife’s Cadillac. If your looking to improve the drive, tow and haul ability of your leaf spring vehicle, and I say vehicle instead of truck because I don’t know if they have them for other leaf spring vehicles, you are not going to find a better easier to install product that does that for your loaded or unloaded vehicle, IMHO. I will update in a year after next spring mulch haul. I don’t expect zero squat but hope to reduce and improve loaded steering performance. Took longer to jack up truck and remove tires than install kit.



by:

I love the product since i have a 2021 toyota tacoma crew cab long bed with a campertop a robber mat and a jack thats around 450 pounds that a have at all times my truck was sittind low a lilbit plus it was swagging on the road i have summo spring to help my suspention but it was not enoght so i did my research but this was my better option i just installed it yerterday july-8-2021 and went for a ride where i ussually drive everyday and WOW now my truck rides very smood plus it lift my tryck 1 inch on the back now my tryck seats level it took me about 2 hrs but i did right i just follow the intructions and done i love the product the only thing that im concern is that the left side underneat the springleaft there is a breik line that is too close to the roadmaster suspention i hope that with the time dont hit that line because if it does thats the line for the breiks and i will be in trouble replacing it other wise evreything works great i recomend it 100% thanks guys i will buy it again?????best $500 that i spend on my truck



by:

I have a 2020 Silverado 1500 6 cyl Duramax with the Diesel Off Road package (3.73 diff). Travel trailer loaded is probably about 6,000 lb. I took several measurements during and after the spring kit installation. All measurements increased about an inch including the stock suspension with trailer and equalizer bars and with the spring kit installed at 1 mm spacing. A one inch improvement overall. I took the truck on a short drive and didn't notice any difference in ride (wasn't stiffer) which is what I wanted. Good to know that I can adjust the springs to the 2 mm spacing if I want to increase the suspension assist. Going camping next week and looking forward to see how it improves handling and porpoising.



by:

The bed of the truck measured 37.5" with a tool box weighing 200 lbs. The truck felt weighed down with passengers weighing 600lbs. Total weight 800lbs with a tank full of gas. After the install the truck rides smoother and certainly " like new". The stopping distance and acceleration distance have shortened drastically. I'm planning on loading up the bed and the Roadmaster Active Suspension RAS4611. My wife even drive it and she could feel the difference. "It drives like a muscle car." Buy it. Install time at a reputable mechanic shop was a 30 min. Install. I received them today at 1 pm and got it installed at 3:00 pm and finished the install at 3:30pm. It's an investment worth the price over traditional air bag system. Mechanic installed this on 2011 Nissan Titan SV.



by:

Balances ability to tow my 1800 squaredrop Hiker camper with 350 tongue weight as well as roof top tent on Leer 180 camper topper. Better handles load and side to side tipping on '21 Ranger. Keeps sage to a minimum.



by:

I have put these on every pickup that I have owned and not only does it assist with heavy loads, my tires have gone past 80,000 miles before needing replacement. All Chevy Duramax 2500's and 3500's!!



by:

Fantastic! Completely changed the way the truck tows. Kinda rides rougher unloaded, but not too bad.



by:

Did not fit my 1995 F-150. ETrailer was very helpful in an effort to make any adjustments needed. We all decided that they were a "no go" for installation. Return was made easy. I have bought several other pieces of gear since. Thank Etrailer.



by:

i installed these on my 2001 ford f-250 4x4 and this is a huge upgrade whether your towing or empty.truck rides and handles better than it ever has. easy straight forward installation. you will need a t-55 for the front bolt and a 12mm ratchet wrench for the adjustable bolt that tightens the spring and a couple of 22mm and a 19mm wrench or crescent wrenches for the jam nuts. i took the weight off of the leaf springs for easy adjustment of the coil spring and used the thinner of the two disc that came with the kit and it raised the rear of the truck up exactly 1 inch empty without a trailer connected. if you use the thicker disc it will raise it more.



by:

I haven't hooked up my camper yet but set the springs up with the white wafer and it raised my truck 1 1/2 inches which is the amount it dropped after I put on a fiberglass topper. The ride is just a bit stiffer but a lot less body roll I noticed. Not impressed with the 25 Silverado suspension compared to my previous 2017 truck. If the squat is still there after I hook up the camper, there is plenty of adjustment left.



by:

These made such a difference in the ride of my pick up while pulling my enclosed trailer. Let’s squat more stability.



by:

Great product, helps with sway and when the truck has additional weight it progressively compensates. I would add this to any vehicle with leaf springs.



by:

I don’t think they are really made for the old PU. 1997 k1500 8 ft bed with a 750 lbs camper tong weight I think I had to put to much pressure on the Kurt stabilizer chains to get level. It looked like the newer truck reviews on YouTube were great thanks Dingler.



by:

2023 F150. Install was fairly easy. Set at 25%. Ride unloaded a bit stiffer, but handling much better. Lifted rear of truck about an inch. Towing 7500 lb camper down NYS thruway which is crowded with much unforgiving bumps and pot holes the ride was more manageable. The 25+ mph cross winds did make for quite a bit of sway still, not as bad as before adding the RAS. Still felt passing trucks trying to suck me in, not as bad as before.
I plan on cranking the RAS to 40% on next camping trip and hopefully give the RAS 5 stars.



by:

I purchased the RAS system 6 months ago to help with rear end sag & control while towing our 22 ft 4200lb camping trailer. It improved sag & helped handling even when not towing! I don't get the bounce when driving on bumpy uneven roads the wheels stay planted on the road. I recently purchased a 8000lb camping trailer & my 24 1500 Silverado handles it very well, I will adjust the RAS to the next step up for the extra weight when time permits.
The install took just over an hour with help from a friend & a car lift which is good since I'm 70 years old.
Great product!



by:

Just perfect to level the rear of my GMC 1500 Denali with the 29' Airstream (900 lb tongue wt). Preload is set at 1mm. I tried 2mm and it was overkill for this application. I was pleased with how easy the install was. I had to use a two jack hack to get the rear tires off since my 19" lift floor jack didn't quite have enough reach. You lower the differential after the tires are off so the rear axle is hanging free for the install. See photos



by:

Big difference my van does not wabble anymore. Great product. Thanks


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See what our Experts say about this RAS Vehicle Suspension

  • Best Anti-Sway Product for Pleasure Way RV on 2001 Dodge Van Chassis
    To control sway from passing trucks and crosswinds the best option for your 2001 Dodge van RV is a rear anti-sway bar. The Roadmaster kit # RM-1129-111 fits your 3500 RV cutaway and installs (without any drilling) between your axle and frame to reduce body roll. All needed hardware is included in the kit and the instructions are linked so you can review them ahead of time. This will be the most effective first step to reduce sway but you can still add other aftermarket kits later on if...
    view full answer...
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  • Rear Suspension Enhancement that Fits 1999 Dodge Durango
    Hey Thale, so we have a similar helper spring upgrade solution for your 1999 Dodge Durango but we do not have a Roadactive system that is a fit. Instead you'd want the Hellwig EZ-550 part # HE72FR which is a confirmed fit and would work great to provide you with additional rear suspension support.
    view full answer...
  • Can Active Suspension Kit be Used With Rear Anti-Sway Bar on 2000 Dodge MaxiVan 3500
    The RAS Kit # RAS4611-DV can work in conjunction with the Roadmaster Anti-Sway Bar # RM-1129-107. They have similar purposes but I think you'll gain a little bit from the RAS kit over the anti-sway bar. The RAS will strengthen the leaf springs and help with overall suspension. This will in turn help with sway like the anti-sway bar will. In addition, the RAS will reduce body roll while cornering which is often a major concern with a heavily loaded van. Keep in mind neither will increase...
    view full answer...
  • Leaf Spring Suspension Helper Kit for 1990 Dodge B250 2WD Van
    We do have a leaf spring suspension helper kit for your 1990 Dodge B250 2WD van, SuperSprings Suspension Stabilizer and Sway Control Kit # SSA7MTKT and others types that are shown on the linked page, but the RoadActive RAS # RAS4611-DV is not a fit for your B250. The SuperSprings # SSA7MTKT bolt on above your OEM leaf springs and reinforce them to reduce sway from passing trucks, wind and when cornering. They adjust themselves automatically based on the load on your OEM springs and they...
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Mary K
Written by:
Mary K
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Noah M
Updated by:
Noah M

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