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  1. Vehicle Suspension
  2. RAS
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  4. Rear Axle Suspension Enhancement
  5. Standard Duty
Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit

Item # RAS4611
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Retail:$555.49
Our Price: $499.00
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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. Lowest Prices for the best vehicle suspension from RAS. Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part number RAS4611 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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RAS Vehicle Suspension - RAS4611

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

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.


Features:

  • 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: 2,000 lbs
    • Roadmaster Active 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

Roadmaster Active 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.



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

Installation Details RAS4611 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - RAS4611

Average Customer Rating:  4.7 out of 5 stars   (441 Customer Reviews)

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:

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


by:
2011 Nissan Titan

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


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:
Chevrolet Silverado 1500

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!




by:
Chevrolet Silverado

2005 Silverado 1500 4x4. Best suspension upgrade including trying multiple shocks to cure rear hop and shake. Wish I had done this a decade earlier. Improved travel trailering stability as well.




by:
2008 Nissan Titan

I am on a Nissan titan 08. The roadmaster active suspension is really easy to install here for someone who has very little knowledge when it comes to stuff like this. I was able to do it on my own. I’ll write another review in a couple of months see how it works out here in the Coachella Valley California here we get to 123° weather sand storms so I’m gonna put it thru trials see how good it is.I own a landscaping company and I haul a lot of rock, and DG, boulders.




by:
2007 Nissan Leaf

The RAS arrived on time and was super easy to install. It took my son and I about 45 minutes to install. It helps when you have all the right tools handy. The only thing I didn’t anticipate was the Allen wrench needed to reinstall the cross bolt in front of the leaf spring shackle. Fortunately, we had the right size on hand. So far so good. Haven’t had a chance to hook up to my RV yet. I’m optimistic it will take some stress off the leaf springs.




by:
2020 Chevrolet Silverado

The install was straight forward, no lift so it took a couple hours, no problems following written directions. Drove my 2020 Silverado 1500/Diesel around and didn't notice any significant change in the unloaded ride. Very happy with the product, we'll see how it performs when I get my RV behind it.




by:
Chevrolet Silverado 1500

installed them in 30 minutes. Super easy. Made a huge difference when towing my 8000 lb camper with my 1500 silverado




by:

Ok well so ce I have put it on my truck I haven't haul a whole lot with extra weight but I did put a very heavy trailer on it and it did make a big difference in sag the ride is not affected by the system either glad I put in on my truck




by:

I order these on Friday afternoon and I received them Monday afternoon. I had watched the clip on installation before ordering and it looked pretty easy. The installation instructions are very self explanatory and they were easy to install. From the time I starter until I had the tools picked up and put away it was about an hour and that was with taking a few phone calls. My initial ride after installing these was very good. I drove over a fairly rough road and tracks. My real test will come when I hook up to my trailer and load my tractor or car. I may have to readjust to a heavier setting but it is there if needed.




by:
Nissan

Installed on an 04’ Nissan KC w/tow package. Helped tremendously with towing my travel trailer and leveling my load even with spring bars. Highly recommend for heavy towing or on large loads.




by:
2019 Chevrolet Silverado 1500

This was by far one of the easiest installs that I have done in a while. The item shipped quickly and the instructions were very clear and concise. It took about 45 minutes total to install and the resulting handling performance exceeded my expectations, and I set the gap at 2mm. Thank you etrailer for another great product offering and an awesome buying experience.




by:

Stacy is nice and helpful and easy to deal with. My order arrived sooner than expected, which was nice. I think this is my 4th purchase from etrailer. They are well stocked and the shipping is quick.




by:
2017 Nissan Titan

I installed this kit on a 2017 Nissan Titan and can be installed very easy. The handling on my truck has improved tremendously. I would recommend this product to everyone.


Comments
When I installed it I set it up for 25 load and I pull a 9000 lb dry weight 5th wheel. The suspension kit is still doing its job.
Bill - 06/29/2019



by:
Ram 2500

These helper springs were easy to install and adjust-approximately 25 minutes total. I pull a trailer that has a tongue weight of about 625 lbs. and these helped reduce the squat and sway of the back end of my GMC 2500 pickup. I feel like they did what they were supposed to do and am happy with them. I think the only draw back is that it does lift the bed of the pickup up a little bit when not attached to the trailer which makes climbing in the back a little more difficult but the trade off is worth it.


Comments
I am still happy with the product
Easy T - 03/30/2021


by:

I'm overall pretty happy with The RAS system. I added them to my service body work truck and what I like most is how it helps stabilize the vehicle in turns. I would definitely recommend. I haven't experienced any negative aspects since installing them.




by:

Shipping was fast and item arrived damage free. Cannot comment on installation as I will not be doing that until end of April


Comments
Super, very easy to install,made adjustments after loading 5th wheel, truck stays level after adjustments and bumps are barely noticeable,used air suspension before , this does the same job at a far lower price
Robert - 04/01/2022


by:
GMC

Works well for my application. I pull a 2 car enclosed trailer with a 01 GMC 2500hd with the 8.1L gas motor. Helps with axle wrap and the tongue weight of my trailer. Even when not pulling, they help with the ride quality.




by:

This system doesn’t increase my trucks capacity but greatly improves handeling when I get close to capacity.




by:

I've attached two pictures regarding the items I've recently purchased and installed upon my truck from etrailer.com




by:
2008 Acura MDX

ordered on tuesday arrived on friday Free shipping that was fast. Installed on Saturday morning. after I got the truck on the Jackstands took all if 20 minutes to install. haven't towed anything yet going camping this coming weekend will report more, truck rides better unloaded that before, great customer service




by:

They are great! Easily adjusts for the load I always carry in the back of my truck for work. No more sagging in the back with 700 to 800 pounds in the bed at all times. Put a trailer on the hitch and it even lower. Can be adjusted up or down as needed. Highly recommend.




by:
2011 Chevrolet Silverado

Install was effortless I set to 20% have not put under a load yet. purchased for added stability pulling my flat bed trailer with my tractor. body roll is definitely better thank you.




by:

Doing what it was intended. Easy to put on. Handles fine with it on there loaded or unloaded.



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441
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See what our Experts say about this RAS Vehicle Suspension



  • RAS4611TD or RAS4611 For 2002 Toyota Tundra
    For a 2002 Toyota Tundra the correct Roadmaster Active Suspension kit is the part # RAS4611 as the # RAS4611TD is for newer Tundras that were made in 2007 and after. I verified this with RAS too to make sure it was still correct.
    view full answer...
  • Solution for Porpoising with 2015 Chevy Silverado Towing Rockwood Camper with WD System
    If you are still experiencing a lot of up and down porpoising with your Rockwood Trailer I first just recommend making sure that your weight distribution is rated properly for your setup. You will want to make sure that your total tongue weight, which consists of the trailer's loaded tongue weight along with any added cargo weight coming from behind the rear axle of your Silverado, falls somewhere within the range of your weight distribution system's tongue weight capacity. An under or...
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  • Roadmaster Active Suspension Fit for 2015 Chevy Silverado 1500 Crew Cab 4x4 6.2L
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 is the most recent model and is a confirmed fit for your 2015 Silverado 1500 4x4. This system will work very well to assist with towing a camper along with the Reese Strait-Line dual cam weight distribution system. This suspension enhancement will eliminate wheel hop and axle wrap giving your leaf springs more stability and absorbing the force of the load keeping your factory system from failure and extending...
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  • Rear Suspension Enhancement for 2018 Nissan Titan with Truck Camper Towing Boat Trailer
    For your application with a combination of truck camper and trailer towing the Roadmaster Active Suspension for the 2018 Titan # RAS4611 is the best product option. This kit will support your leaf spring suspension, adjusting automatically to the specific load at any given time. It will reduce sway and level the ride. The RAS gives up to 2000-lbs of load support so it will be ideal for your combination of camper weight and trailer tongue weight. An installation video is linked for you.
    view full answer...
  • Will Roadmaster Active Suspension Benefit 2018 Chevy Silverado 1500 Z71
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 will definitely have a positive impact on the suspension of your 2018 Chevy Silverado 1500 Z71. This kit is different than other suspension enhancements in that it is designed to be active, as its name suggests. What this means is that the system is continually reinforcing your Chevy's leaf springs. As you can see by the accompanying photo the RAS Enhancement Kit installs under your leaf spring which allows...
    view full answer...
    Image 1 for
  • Will Roadmaster Active Suspension Kit Cause Interference With OEM Parts?
    The Roadmaster Active Suspension Kit # RAS4611 that fits your 2016 Chevy Silverado 1500 will not cause additional rusting, damage, or sounds to the original parts on your truck. The manufacturer specifically states this suspension kit has been engineered to fit "without any interference with the original equipment" provided, of course, that it is installed properly. It is an easy install, as you can see in the linked directions, so that should not be an issue.
    view full answer...
  • Suspension Enhancement Recommendation for 2008 GMC Yukon XL
    We have the Roadmaster Active Suspension kit part # RAS4611 which is confirmed as a fit for your 2008 GMC Yukon XL and would work well. Basically this acts like an "add a leaf" type of suspension enhancement when needed but when not needed it allows your truck's suspension to feel like normal.
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  • Recommended Suspension Enhancement for 2011 Nissan Titan Towing a Travel Trailer
    You only need to use one suspension enhancement on your 2011 Nissan Titan; multiple systems would be unnecessary and, frankly, a waste of your hard-earned money. As for your question about capacity, suspension enhancements will not increase the load capacity of your TItan, it is the amount of weight on your truck's axle that the system can handle and remain effective. Weight capacity is one of the ways to decide which system to use, as is the benefits of the system when you are not towing,...
    view full answer...
  • Will Roadmaster Active Suspension for 2017 Chevy Silverado 1500 Damage U-Bolts
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 will in no way damage the U-bolts of your 2017 Chevy Silverado 1500. If you take a look at the accompanying photo of this kit on a Silverado you can see how it installs to the side of the U-bolts. You are making a very intelligent choice with this kit because it is the best way to enhance the suspension for your truck. The reason for that is because the RAS is an active system which works to continually reinforce...
    view full answer...
    Image 1 for
  • Will Installing Roadmaster Active Suspension Enhancement Kit Void 2019 GMC Sierra Warranty
    Installing the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611 on your 2019 GMC Sierra 1500 will not void the manufacturer's warranty. Consumers are actually protected from this very concern under the Federal Magnusson-Moss Warranty Act, which essentially states that a manufacturer's warranty can't be voided from the simple act of installing an aftermarket product like this suspension kit. The Roadmaster Suspension System is only going to help the factory suspension...
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  • Suspension Enhancement Recommendation for 2008 Chevy Silverado that Mounts on Top of Leaf Spring
    We have suspension enhancement like the Roadmaster RAS part # RAS4611 which attaches to the top of a leaf spring and acts like an overload spring on steroids, but we do not have any air bag kits that fit on top of the leaf spring.
    view full answer...
  • Recommended Active Suspension Kit for 2001 Chevrolet Silverado
    The Roadmaster Active Suspension Kit # RAS4611 referenced in your question will do a really nice job of upgrading the factory suspension on your Silverado. It will work to improve stability, handling, control and will essentially eliminate axle wrap and wheel hop. They will simply install over the existing leaf springs on your truck. This system is designed to fit the 1500 HD/LD, 2500 HD/LD and 3500 models of your 2001 Chevrolet Silverado. It will work great for your particular application. I...
    view full answer...
  • Will the Roadmaster Active Suspension Fit a 2019 Chevy Silverado 1500 Trailboss
    Yes, the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 is a confirmed fit for a 2019 Chevrolet Silverado 1500 Trailboss.
    view full answer...
  • Can I Use Roadmaster Active Suspension With A Weight Distribution System
    The Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 will work well with the weight distribution hitch. If you are experiencing vehicle sag, I recommend to first make sure the tongue weight of the trailer is 10-15% of the loaded weight of the trailer. You also want to make sure your weight distribution head and spring bars are set up correctly with the right amount of tension. Any weight behind the rear axle of the Titan plus the loaded tongue weight of the...
    view full answer...
  • Can Roadmaster Active Suspension Kit and Timbren Kit be Used at Same Time
    If you were in a situation where you needed more support than what the Roadmaster Active Suspension kit # RAS4611 could provide and were thinking about also adding a Timbren kit you are probably overloading the suspension of your tow vehicle. The two kits will physically fit at the same time on a vehicle but the ride quality would be really rough. I'd go with just the # RAS4611 and if more support is needed I'd try adjusting the RAS so that more support is provided.
    view full answer...
  • Maintenance Free Suspension Enhancement for 2019 GMC Sierra Denali Hauling Cargo or Towing Trailers
    For your 2019 GMC Sierra 1500 I think the perfect solution is with the Roadmaster Active Suspension Enhancement Kit # RAS4611, which fits whether you have the 2WD or 4WD. This is a "set it and forget it" type system that secures under the factory leaf spring and around the existing U-bolts to essentially convert it into a mechanically active suspension system. This just means the leaf springs are strengthened as soon as it's installed, and you don't have to wait for a load or hooked up...
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  • Do You Have To Lift a 2019 Chevy Silverado 3500 To Install RAS Leaf Spring Enhancement Kit
    In order to install the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 on a 2019 Chevrolet Silverado 3500 you will need to remove the rear wheels which would require a jack and jack stands but not a lift. The reason for this is because you would not have any room to work if the wheels were not removed and the suspension also needs to be unloaded in order to mount the system. That said, this is the case for all suspension enhancements in regards to needing...
    view full answer...
  • Will the RAS4611 Work on my 2018 Nissan Titan SV 2WD with Leveling Blocks
    Yes the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS4611 will work with your 2018 Nissan Titan with the leveling block installed. There is no interference to worry about. I really like the Active Suspension system not only will it help out a great deal while towing but you will be very pleasantly surprised in the improved handling characteristics when you aren't hauling. I've installed several of these systems and they are easy to put on and is something...
    view full answer...
  • How Much Can a 2004 Chevy Suburban 1500 LS Tow
    The towing capacity of a 2004 Chevrolet Suburban 1500 LS can be as high as 8,400 lbs but the exact towing capacity will vary by options so be sure to take a look in the owner's manual. If the loaded weight of the trailer does not exceed the towing capacity of the vehicle then you will be safe to tow. That said, it sounds like you could be towing toward the upper limit of the vehicle's capacity so in which case you'll want to use some suspension enhancements alongside the weight distribution...
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  • Roadmaster Active Suspension System for 2019 GMC Sierra 1500 Denali
    You were looking at the correct part; the Roadmaster Active Suspension # RAS4611 is a confirmed fit on your 2019 GMC Sierra 1500 Denali. The RAS system helps turn your leaf spring into a mechanically active suspension system that will help level variable payloads and create more stability in your ride. I've linked a great video of these that helps show how they work.
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  • Best Suspension Enhancement for 2020 GMC Sierra 1500 4WD That Won't Affect Normal Ride
    The best suspension enhancement for your 2020 GMC Sierra 1500 that will not affect your normal ride is the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit # RAS4611. The Roadmaster Active Suspension (RAS) is the best for your truck because it is an active system which works to continually reinforce your original leaf spring suspension. The force normally put on your Sierra's leaf springs, particularly when towing, gets transferred to the RAS Enhancement Kit, allowing your...
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  • Suspension Enhancement for 2017 Sierra 1500 that Bounces When Towing
    The best solution to prevent the bounce and improve the ride quality when towing with your 2017 GMC Sierra 1500 will be with a Roadmaster Active Suspension kit # RAS4611. Unlike other suspension kits this gives you the support you are wanting without sacrificing ride quality. Most report back that their ride quality actually improved which is unlike any other option.
    view full answer...
  • Correct Setting for Roadmaster Active Suspension On 2020 GMC Sierra 1500
    The correct Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit for a 2020 GMC Sierra 1500 is part # RAS4611. In regards to installation, you can set the spring tension to 25% additional load carrying capacity or 40%. I recommend starting with 25% tension and if this is not enough work your way up 40%.
    view full answer...
  • Setting Advice When Setting Up Roadmaster Active Suspension Kit RAS4611 on Silverado
    You'll have to experiment with the settings of the # RAS4611 to find what works best to level your trailer. I can't give you an exact setting to use but I would try increasing the settings until you reach the desired level of reduced sag.
    view full answer...


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    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Video by:
Kathleen M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Randy B
Test Fit:
Randy B
Employee Kevin C
Test Fit:
Kevin C
Employee Mary E
Written by:
Mary E
Employee Matthew E
Updated by:
Matthew E
Employee Noah M
Updated by:
Noah M

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