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  1. Vehicle Suspension
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RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Item # RAS3611-CHD
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Our Price: $569.00
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3,000-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. Lowest Prices for the best vehicle suspension from RAS. RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty part number RAS3611-CHD can be ordered online at etrailer.com or call 1-636-306-4830 for expert service.
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RAS Vehicle Suspension - RAS3611-CHD

  • Leaf Springs
  • Rear Axle Suspension Enhancement
  • RAS
  • Heavy Duty

3,000-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.


Features:

  • Heavy-duty custom kit converts your vehicle's factory leaf springs into a mechanically active suspension system
    • Actively strengthens leaf springs for improved ride quality with or without a load
  • All-in-one suspension system improves stability, handling, and control
    • Eliminates axle wrap, wheel hop, and bottoming out
    • Reduces dangerous sway and body roll while cornering
    • Keeps your ride level when towing or hauling a heavy load
    • Improves traction while breaking and accelerating
  • Variable-rated coil tension springs automatically adjust to your vehicle's load
    • Activate immediately to support the extra weight
    • Disengage when unloaded, allowing your leaf springs to perform as intended
  • Customizable coil springs can be adjusted during installation to accommodate your towing or hauling needs
    • Independently adjustable for side-to-side leveling of off-center loads
  • Helps extend the life of leaf springs, shock absorbers, shackles, and even tires
  • Durable, epoxy e-coated steel construction
    • Corrosion-resistant brackets on the ends of each unit have a salt spray rating of more than 800 hours
  • Easy, bolt-on installation - no drilling, cutting, or welding required
    • Unit secures under the leaf spring and around the factory U-bolts
    • Fully assembled kit and hardware are included
  • Maintenance-free - adjustments and monitoring aren't needed once installed
  • Made in the USA


Specs:

  • Weight capacity: 3,000 lbs
    • RoadActive Suspension will not increase your vehicle's weight-carrying capacity
  • 5-Year warranty
  • 30-Day money-back guarantee


All-In-One Suspension System

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 are 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.


Diagram of RAS Installed

RoadActive Suspension (RAS) kits enhance those passive leaf springs by converting them into a mechanically active, all-in-one suspension system. RAS kits have variable-rated coil tension springs that automatically adjust to your heavy load. Other suspension systems only solve a few problems and usually at the expense of other improvements your factory leaf springs may need. RAS, on the other hand, is a unique kit that provides everything you want in a suspension system without any trade-offs. It eliminates bottoming out like air springs, reduces sway and body roll like sway bars, keeps your ride level like helper springs, and improves traction and braking control like traction bars. This improves your vehicle's stability, handling, and control while you are towing or hauling, as well as when your vehicle is unloaded. RAS also makes your overall driving and towing experience safer and more comfortable, which greatly lessens driver fatigue.


How RAS Works

Close-Up of RAS Tension Spring

Each RAS unit has a powerful variable-rated coil tension spring that converts your passive leaf spring into a mechanically-active system. Once your vehicle is loaded, the tension springs immediately activate to absorb and support the weight. This allows your leaf springs to maintain their bowed position and keeps them from flattening out or flipping over, which greatly hinders their ability to bear a heavy load. The tension springs are variable-rated, which means that the heavier your load is, the more assistance they provide to your leaf springs. Because of this design, RAS reacts instantaneously, whereas hydraulics, air springs, and other suspension systems take time to react. And unlike your factory leaf springs, RAS stops sway and sag before they even start to happen. Additionally, when your vehicle is unloaded, the tension springs disengage, allowing your leaf springs to perform as intended without hardening your ride. RAS won't hinder your leaf springs' movement, nor will it cause any friction between any of the brackets.


Eliminates Axle Wrap and Wheel Hop

RAS Eliminates Axle Wrap

When under a heavy load, leaf springs are especially susceptible to axle wrap, which can cause wheel hop. Wheel hop is when the tires lose their grip on the road, causing a jarring, up-and-down movement. Axle wrap occurs when the circular motion of the tires cause the leaf springs to twist or rotate. If the leaf springs twist far enough, wheel hop can occur. RAS stabilizes your leaf springs by absorbing the force of the load they're trying to support. This eliminates axle wrap and wheel hop, as well as prevents your vehicle from bottoming out. Because of this, less strain is put on your vehicle. And by reducing some of this wear and tear, RAS helps extend the life of your leaf springs, shock absorbers, shackles, and even tires.


Reduces Sway and Body Roll

RAS eliminates sway and body roll

When driving along a curve while towing or hauling a heavy load, the back end of your vehicle or trailer can start to shift with that weight. If your factory leaf springs have flattened or twisted under this load, they won't be able to prevent it from shifting. Because of this, your trailer will sway away from your vehicle. This makes driving challenging and dangerous, as it increases the risk of body roll, which is when your vehicle drastically leans to one side. This can often cause you to completely lose control of your vehicle. Body roll is especially prevalent with multi-passenger vans and vehicles towing long campers, trailers, or boats. RAS provides a much safer ride by reinforcing your factory leaf springs and stabilizing your load. This helps prevent sway from occurring and reduces the chance of body roll while cornering, turning, and swerving. RAS also lessens the rocking motion that happens during windy conditions or when a semi passes by on the road.


Levels Your Ride and Improves Traction

RAS Levels Your Ride

When your vehicle is overloaded, the bulk of the weight transfers to the rear axle. Your factory leaf springs then become overwhelmed by this weight, as they are not strong enough to support it. This causes the back end of your vehicle to sag and the front end to rise, which means that the front tires have lost some of the grip they need with the road. In addition to loss of traction, it can also cause poor headlight aim, unintentional swerving, and an extremely bumpy and uncomfortable ride. RAS bolsters your factory leaf springs and enables them to provide support for your load without compromising ride quality or comfort. This keeps your ride level from front to back whether you are hauling a load in the bed or towing a boat, trailer, or camper. RAS also ensures that your tires have the traction they require while braking and accelerating, which improves the overall driving experience.


Customizable Coil Tension Springs

Adjusting Spring With Spacer

RAS is also customizable. During installation, the coil tension springs can be adjusted to 2 different tension settings or anywhere in between for improved road handling and support. To do this, rotate the springs while keeping the threaded rod still. As you turn the spring, use one of the 2 included spacers as a gauge to measure the widening gaps between the coils. In order for the RAS units to work as intended, you must tension the coils to a minimum of 25 percent with the 1mm white spacer and no more than 40 percent with the 2mm spacer. The springs can also be independently adjusted to compensate for off-center loads such as a handicap lift.


Easy, Bolt-On Installation

RAS Once Installed

This custom-fit kit comes fully assembled and is easy to install. Each RAS unit simply bolts onto your factory leaf spring with the included hardware, and drilling, welding, and cutting aren't required. First, position the eye hook bracket so that it wraps around the top of the factory leaf spring eye. Then the axle bracket secures under the leaf spring and around the factory U-bolts on the other side of the leaf spring pack. Once the maintenance-free RAS units are fully installed, you won't need to monitor them as you would with air springs.


Corrosion-Resistant Steel Construction

RAS Construction Close-Up

RAS is extremely durable and corrosion-resistant. The units are constructed of high-grade alloy steel, and they have an epoxy e-coat on the coil springs to provide extreme corrosion resistance. The brackets on the ends of each unit resist the effects of water and other elements, and they have a salt spray rating of more than 800 hours.



3611-CHD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS3611-CHD Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty - RAS3611-CHD

Average Customer Rating:  4.7 out of 5 stars   (506 Customer Reviews)

3,000-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.

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2020 GMC Sierra 2500




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Review from a similar RAS in Vehicle Suspension


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


Comments
Its been working very well i loaded a couple of times and its awesome
Miguel - 07/10/2022


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Review from a similar RAS in Vehicle Suspension


Total transformation! I never knew how bad my ride was until I installed these RoadMaster 3611-HD active suspension. It took longer to safely jack my truck up and remove tires than it was to install them! Absolutely a game changer. I carry about 1000 lbs of tools and supplies daily and like riding a Rollercoaster when hitting bumps. Now, i hit bumps on purpose just to feel these RoadMasters work their magic! Love them!


Comments
After a year of use , these RoadMaster 3611-HD active suspensions are still the best addition to my trucks performance. The streets of Houston are brutal and these active suspension breeze through them. I have 354000 on this truck and if I ever get another, this Active Suspension will be the first addition. Hands down!
Tracey T - 04/29/2022


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Review from a similar RAS in Vehicle Suspension


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.


Comments
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.
Rick M - 03/27/2022


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Review from a similar RAS in Vehicle Suspension


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.




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Review from a similar RAS in Vehicle Suspension


Roadmaster active suspension seems to be built very well. I look forward to towing my travel trailer very soon to see if it improves the towing experience.


Comments
It has been a year now since I installed the Roadmaster Active Suspension system on my 2018 F150. We pull a 30 ft travel trailer from Wisconsin to Alabama.Last year the roads became very slippery when we encountered a rain snow mix. The truck and trailer tracked perfectly. I just hooked up the rig yesterday to take the same trip, leaving tomorrow. The truck definitely handles better with the RAS. Im glad I installed it and am sure it will last for years.
Dave H - 01/30/2022


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Review from a similar RAS in Vehicle Suspension


Admitedly, I haven't even rolled my '07 Silverado 2500HD classic out of the garage yet, but I'm already very pleased. I had to go to a neighbor for a 10mm hex key socket and was slowed down by my 7yo kid 'helping', but it was still only 90 minutes my jack stands were in use. Easiest thing to do!
My only small downsides so far:
* needed to find a 10mm hex key that I apparently don't own, not sure why they picked that fastener
* wish I put some loc-tite on; just to make me feel better
* distance to drop the axle so the suspension fully hangs was way further than I expected; barely had my jack stands tall enough to get the job done.

These aren't really bad on the product, just notes for future customers. We're towing the 5er about an hour an a half this coming week, hopefully it steadies up a lot!




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Review from a similar RAS in Vehicle Suspension


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.




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Review from a similar RAS in Vehicle Suspension


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.


Comments
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 R - 08/13/2021
Just like when I bought it.
Sergio R - 08/16/2021


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Review from a similar RAS in Vehicle Suspension


Good service. Fast shipping an very easy installation. Can tell alittle difference already. Haven't hooked up to anything yet but always have a good bit in the bed 85 gallons of diesel an 2 full toolboxes




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Review from a similar RAS in Vehicle Suspension


Haven’t got to tow with them on yet. But overall they look and feel like they are great quality and were extremely easy to install. I had one slight hiccup and had to call customer support. I was on the phone and connected to an actually person within a minute, great customer service.
Without a load, my 98 Blazer rides very smooth, only slightly stiffer than stock. Also raised the rear maybe an inch, but not a big deal.




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Review from a similar RAS in Vehicle Suspension


This is my 2nd set of RAS! Just purchased for towing in my D-Max 2500HD. 1st set we’re on a Chevy 1500. I tow a 7000lb 259FKDS Freedom Express bumper pull and having the RAS-HD’s installed is night and day difference in towing. I have them set at 40% because of my cargo in the truck bed and tongue weight. I’m set up right now as I type on a 100 mile camping trip to set the springs and readjust if needed! So I say….”if you need support with towing, give RAS3611-HD a try…you won’t be disappointed with the results”




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Review from a similar RAS in Vehicle Suspension


Installed this on my 2020 GMC 1500 Denali. The one thing I hated about my Denali was how much a small amount of weight made it squat. The Denali is meant for smooth ride not towing! These springs brought the back of my truck up by an inch. Truck doesn't squat when being "exuberant" leavin red lights. Ride quality when empty hasn't changed. These springs are AMAZING but, are not a cure for all your hauling needs! When I'm hauling my 1800lb side x side on my trailer they work great! Hauling my 4500lb tractor... Load stabilizer hitch still recommended!




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Review from a similar RAS in Vehicle Suspension


The Roadmaster suspension kit did provide the additional stability and load carrying capability for towing a 6000lb rv travel trailer with a 2018 GMC Sierra 1500 Denali with Magnetic Ride Control system. However without the load the ride was rough and raised the rear of the vehicle so that night time driving with dim lights was reduced. The suspension kit was easy enough to remove during the off season of RV use, however is an inconvenience. It would be great to have Roadmaster create a system that would work with the Magnetic ride system without having to install / remove for the use and still continue to have a OEM smooth ride.


Comments
I reached out to the manufacturer about the rough ride that you have experienced. They did have a suggestion to make. It seems like that the system is adjusted to the 2 mm on the black shim. You can reduce the tension to 1-1.5 mm gap between the coils then it will help achieve a softer ride. You will want to raise the rear of the truck in the air and then leave the axle handing free. Using a dime as a gauge to redusce the gap between the coil springs. The adjustment can be done, with only one side in the air at a time.
-- Etrailer Expert Jenny N - 04/15/2022


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Review from a similar RAS in Vehicle Suspension


Night and day difference on our 2011 F150. Before installing the vehicle was almost undrivable at highway speeds due to bouncing/jerking when pulling our trailer. The bounce/jerk has been virtually eliminated since installing the Active Suspension. Installation was a breeze, hardest part was getting the wheels off the truck due to corrosion between the wheel and the rotors. Total install time was roughly 1hr 15 minutes including the stubborn wheels. Initially I was hesitant to order due to the price, but very happy with the results, etrailer also did a great job at guiding me through the process, shipping and answering a few technical questions along the way. Highly recommend if you need a little more spring/payload.




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Review from a similar RAS in Vehicle Suspension


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


Comments
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.
Rich - 03/10/2021


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Review from a similar RAS in Vehicle Suspension


Silverado 2500HD
Ready to install out
of the box. Simply extend the RAS out to become the proper length (shortened for shipping), remove the bolt to allow the fork to drop over the leaf spring and reconnect, hand tighten the assembly via turning the spring and check the "centered alignment", then tighten with a wrench (my socket wouldn't quite fit) until gap disc slips freely between the expanded spring. Took me longer to prep truck on a jack and two axle stands/remove tires for improved accessibility than the actual RAS installations.

Added 1 inch of lift "empty weight". Will see how much squat is removed under load of our travel trailer this weekend!

I'm not very mechanically inclined, and found this very easy to self-install - a level 1 project.

NOTE: etrailer customer service also took their time w/ me over the phone to ensure I had ordered the proper kit for my vehicle, and although my order was sent to the vendor for direct shipment, I got it to Alaska in less than 10 days.




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Review from a similar RAS in Vehicle Suspension


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.


Comments
Makes the ride a little stiffer but its a truck. Great when pulling my 37 camper. Helps out a lot!!!!
William - 03/30/2021


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Review from a similar RAS in Vehicle Suspension


I tow a 31 foot trailer with my 1/2 ton. Before adding this product the sway was still noticeable, especially with 30 to 40 km wind gust, even with a Curt 4 point sway control hitch. After adding this product I noticed significantly lower sway and better towing.




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Review from a similar RAS in Vehicle Suspension


I read a lot of reviews before buying the Roadmaster Active Suspension system and was happy with what I read. I live in BC Canada and ordered the product at 01:30am April 27th 2022 and it arrived in perfect condition May 3rd. I was expecting to pay duty but there was non. Very happy with the fast informative service from etrailer. I could follow the item through transit updates as it was being shipped.
I have a 2020 Ford F-150 King Ranch with the 6' box. We're getting a 29' travel trailer, 5,000 lbs, this summer so I wanted to be prepared, at least regarding the suspension.
I installed the system the day it arrived. I took the wheels off for easy access which was pretty easy. The suspension has to be hanging free for the proper install. The system install was extremely easy. The installation instructions are simple and with pictures. Once the system was installed to spec I took it out for a test ride. It actually did make a difference for a smoother ride. It softened out the bumps without the jumping around an empty truck may experience. Not saying my truck was a rough ride to begin with but I did notice a change. Just have to get the trailer to test it out now. I'm already planning to get the Roadmaster Comfort Ride suspension kit for my new trailer so I should have a smooth riding system.




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Review from a similar RAS in Vehicle Suspension


I put these on my 2018 F150 and towed a fully loaded 17' foot cargo trailer from from Washington to Florida through bad weather and even performing some high speed emergency avoidance. I feel that the safety of that trip relied heavily on the positive effects of Roadmaster on my suspension!




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Review from a similar RAS in Vehicle Suspension


Follow up to my earlier review.
On top
of the excellent care and service from etrailer, the roadmaster active suspension was easy to install. My Travel Trailer has a 1200lb hitch weight so I used the black spacer. The RAS gave my truck a 1 1/2” lift. I had recently loaded my truck to the top of the sidewalls with wood for the winter. Barely put a squat in the suspension. The truck handled on the highway like it had a quarter the weight. There was no noticeable sway or body roll. Unloaded the truck handles better than it did with just the leaf springs. Does not feel like hockey puck suspension. Love the RAS kit. My truck is a 2018 Ford F-150 eco boost with the max tow package. Looking forward to hooking up the Travel Trailer this fall.




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Review from a similar RAS in Vehicle Suspension


Just had the roadmaster suspension assist installed today. The ride feels a bit smoother and truck back end feels tighter. Have not had a chance to hook up our 28 foot RV but I will be sure to revisit after. So far I feel good about this purchase


Comments
Still working great after 1 year! Sure love how it handles our 28 foot RV. More stable, less swaying and bounce
Forrest F - 04/11/2022

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See what our Experts say about this RAS Vehicle Suspension



  • Recommended Helper Spring Solution for 2020 Chevy Silverado 3500 With Slide In Camper
    Actually, as long as your 2020 Chevy Silverado 3500 isn't a dually, the RoadActive Suspension # RAS3611 would counteract the rear sag thus leveling out your ride and would reduce sway and body roll, so it would be the perfect solution. If you have a dually with top overload springs, you'd want to use the # RAS3611-CHD instead. I've linked to a video showing a typical install for you.
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  • RoadActive Suspension Leaf Spring Enhancement for 2022 Chevy Silverado 3500 Dually
    There absolutely is a RoadActive Suspension system available for your 2022 Chevy Silverado 3500 DRW truck. You'll want to use part # RAS3611-CHD which is compatible with 2 wheel or 4 wheel drive vehicles. I've linked to a video showing how the RoadActive Suspension system works.
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  • RoadActive Suspension Kit for a 2020 GMC 3500 SRW 4WD w/ Factory Overload Springs
    For your 2020 GMC 3500 SRW 4WD you're going to want the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty item # RAS3611-CHD. This kit has the extra spacers for the factory overload springs which is what I think you are referring to. This kit installs quickly and is easily adjustable. This system also does not affect your ride quality like other systems do.
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  • What is Best Suspension Enhancement for 2020 GMC Sierra 3500
    The RoadActive Suspension kits provide the best support, ride quality, and improved handling of all of the suspension enhancement kits out there including air bags. So for your 2020 GMC Sierra 3500 I would recommend the part # RAS3611-CHD and you'd have the best setup out there for your truck.
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  • Does RoadActive Suspension RAS3611-CHD Fit A 2016 Chevy Silverado 3500HD W Overload Spring?
    The RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-CHD you purchased is confirmed to fit your 2016 Chevrolet Silverado 3500HD with the top overload springs. To install the # RAS3611-CHD on your truck you will need to remove the top overload spring which you can see in the included written instructions for the Ford F-250/350 with the only difference being you will not need to trim the spacer as the instructions show. The reason you need to remove the top...
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  • Suspension Enhancement for 2021 Chevy Silverado 3500 With Camper Shell
    The best modification to the rear suspension you can make to your 2021 Chevy Silverado 3500 is going to be the RoadActive Suspension System part # RAS3611-CHD. This gives you the support you are needing, the best stability, and unlike other options it actually gives you an improved ride quality.
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  • Rear Suspension Enhancement for a 2022 Chevrolet Silverado 3500 Towing a Trailer
    The rear suspension enhancement I recommend for your 2022 Chevy Silverado 3500 is the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-CHD. This kit will provide 3000 lbs. of load leveling support when you are towing your trailer, but it also does a lot more than that. The way that it is designed it will also eliminate axle wrap and minimize sway and body roll giving you a much more enjoyable loaded and unloaded ride, where most rear suspension enhancement only helps when...
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  • What Are The Steel Plates In The RAS System Used For.
    The plate you are referring to in the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-CHD will replace the upper overload on your suspension if you have it.
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  • Will the RoadActive Leaf Spring Kit # RAS3611-CHD Provide Support with a 3,400 Vertical Weight?
    When it comes to the 3,000-pound capacity of the RoadActive Suspension Leaf Spring Enhancement Kit - HD # RAS3611-CHD, it is important to note that this kit is not designed to increase your available weight capacity on your 2020 Silverado 3500HD with a 3,700 pound cargo capacity. With that being said, the kit will definitely provide the benefits of reducing sag, reducing dangerous sway, and improving overall control. The added support of the # RAS3611-CHD with the 3,400 pound vertical weight...
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  • Best Suspension Enhancement for 2019 Chevy Silverado 2500HD Towing Fifth Wheel
    The best suspension enhancement kit we offer for your 2019 Chevy Silverado 2500 is the RoadActive Suspension kit part # RAS3611-CHD. This kit is easily adjustable to give you the exact amount of support you want, installs easily, and unlike other options improves ride quality and stability when loaded and unloaded. Other options will make the ride quality pretty harsh.
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  • What is Best Suspension Enhancement for 2022 Chevy Silverado 3500
    The best suspension enhancement for your 2022 Chevy Silverado 3500 is going to be the RoadActive Suspension kit part # RAS3611-CHD which would technically work with your Stableload installed but I would recommend taking that off and just letting the adjustable support of this kit give you what you need. This will get rid of your sag and also improve ride quality and handling whereas the Timbren kit most likely will hurt ride quality.
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  • Min and Max Settings for RoadActive Suspension on 1978 Chevy Scottsdale C20
    The RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-CHD for your 1978 Chevy Scottsdale C20 (and the other RAS kits) do have minimum and maximum settings. The minimum we're looking at no less than 25% of the 1mm white spacer and for maximum we're looking at no more than 40% of the 2mm spacer. So I wouldn't go any larger than that.
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  • Will the RoadActive Suspension Work on a 2017 GMC Sierra 3500 with Overload Leaf Springs
    The extra leaf springs you are referring to are called overload leaf springs. The RoadActive Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-HD will not work with overload leaf springs but the RoadActive Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-CHD will as it is designed specifically for this purpose. I have attached a review video for you.
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  • Recommended Suspension Enhancement Without Air Bags for 2019 Chevy Silverado 3500 Duramax
    We have just what you're looking for in the RoadActive Suspension; if your 2019 Chevy Silverado 3500 is a single tire rear axle you can use part # RAS3611-HD or if you've got a dually you'll want to use # RAS3611-CHD. The RAS system works with the leaf springs on your 3500 to create a mechanically active suspension system that will help fight the squat and body roll that you've been experiencing while towing that large of a trailer. This system is a great alternative to the air bags since...
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  • Suspension Enhancement Helper Springs for 2004 Chevy Silverado 2500 With Suspension Lift
    You can use helper springs on your 2004 Chevy Silverado 2500 with a suspension lift which will absolutely help with the sag and give you an overall better ride. I don't know of a way to tell if you have add-a-leaf or replacement springs, I do know the kit you can use, which is the RoadActive Suspension. The correct one will depend on if your '04 Silverado has the factory top overload springs or not: - Without Top Overload Springs: RoadActive Suspension Custom Leaf Spring Enhancement Kit...
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  • Determining if 2016 GMC Sierra 2500HD Has Overload Springs to Pick Out RAS Suspension
    You'd want to look at the springs of your 2016 GMC Sierra 2500HD to determine if it has overload springs (most likely it does). If the spring pack has what looks like a smaller spring attached to the bottom of the spring pack that is flatter than the rest of the leaves then you have the overload springs and the correct RoadActive System is the part # RAS3611-CHD but if they aren't there you'd need the # RAS3611-HD instead.
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  • Best Suspension Enhancement For 2021 GMC Sierra 3500 Single Rear Wheel When Towing 5th Wheel
    We can get your 2021 GMC Sierra 3500 with a single rear wheel set up with an outstanding suspension enhancement option that will help your truck's sag, improve it's handling, won't negatively affect your unloaded ride, is simple to install relative to other options, and requires no maintenance whatsoever. The best enhancement option for your truck that meets all these criteria is the RoadActive Suspension Custom Leaf Spring Enhancement Kit. There are two options for you, depending on...
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  • Determining If RAS Leaf Spring Enhancement Kit RAS3611-HD Will Fit 2007 Chevy 2500HD Classic
    The RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD you were looking at is confirmed to fit your 2007 Chevrolet Silverado 2500HD as long as it does NOT have the top overload springs. If your truck does have the top overload springs you will need to go with the # RAS3611-CHD instead. Both options have the same 3000lb load capacity which will do a great job of preventing sag when towing a trailer or carrying a heavy payload, but will also eliminate axle...
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  • Suspension Enhancement Recommendation for 2020 Chevy Silverado 2500HD with Camper
    I'd recommend a different route for adding suspension enhancement to your 2020 Chevy Silverado 2500 that has a camper and will be towing. The best suspension enhancement we have for your truck is the RoadActive Suspension system part # RAS3611-HD for if you do not have overload springs or the part # RAS3611-CHD for if you do. Unlike other kits these give you the support you are wanting this also improves the ride quality and handling which is especially valuable when carrying a camper...
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  • Best Suspension Enhancement for 2020 GMC Sierra 3500 Towing Fifth Wheel
    For your 2020 GMC Sierra 3500 single rear wheel diesel the best suspension enhancement option we have is the RoadActive Suspension kit part # RAS3611-CHD for if you have factory top overload springs or # RAS3611-HD for if you do not have them. Unlike other suspension enhancement options the RAS systems give you the best support while also improving ride quality loaded and unloaded unlike other options which make the ride quality rougher especially when unloaded. Stability and handling...
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  • Best Suspension Enhancement Recommendation for 2021 GMC Sierra 2500HD
    The RAS systems like what you asked about are the best all-around suspension enhancement for your 2021 GMC Sierra 2500 with the part # RAS3611-HD for if you do not have the factory overload springs or the # RAS3611-CHD for if you do. This kit unlike other options gives you the support you want without any compromises. Other kits will affect ride quality (loaded and unloaded) whereas this actually improves ride quality. It's also easily adjustable, installs easily, and also acts almost like...
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  • Best Suspension Enhancement for 2020 Chevy Silverado 2500HD Towing Fifth Wheel
    The best suspension enhancement kit that fits your 2020 Chevy Silverado 2500 towing a fifth wheel trailer is the RoadActive Suspension kits like the one you referenced. These provide the best adjustable support that's easy to install, improves ride quality, and stability. Most options will make the ride quality harsher loaded and unloaded but these actually will make it softer. If you have factory overload springs you'd want the part # RAS3611-CHD or if you do not have them you'd want...
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  • Best Suspension Enhancement For 2020 Chevy Silverado 2500 Towing 5th Wheel That Wont Affect Ride
    The best option for suspension enhancement for your 2020 Chevy Silverado 2500 that won't affect your ride is the RoadActive Suspension (RAS). This kit will offer support to your Chevy's suspension only when there is weight applied to it, like when you are towing your 5th wheel trailer. This is called an "active system" which continually reinforces your leaf spring suspension; what that means is the force normally put on your Chevy's current leaf springs will be transferred to the RAS kit,...
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  • Correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2022 GMC Sierra 2500
    The correct RoadActive Suspension Custom Leaf Spring Enhancement Kit for a 2022 GMC Sierra 2500 is part # RAS3611-CHD for models with top overload springs or part # RAS3611-HD for models without. Please note, the 1500 and 2500 models feature much different suspension so you can't transfer parts.
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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Mary E
Written by:
Mary E
Employee Wilson B
Updated by:
Wilson B
Employee Noah M
Updated by:
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Employee Adam E
Installed by:
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