1. Vehicle Suspension
  2. RAS
  3. Leaf Springs
  4. Rear Axle Suspension Enhancement
  5. Heavy Duty
Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Item # RAS3611-HD
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Retail:$589.00
Our Price: $549.00
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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. Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty part number RAS3611-HD can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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RAS Vehicle Suspension - RAS3611-HD

  • 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
    • 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.



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

Installation Details RAS3611-HD Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty - RAS3611-HD

Average Customer Rating:  4.7 out of 5 stars   (303 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.

- RAS3611-HD
by:
2010 Nissan Leaf

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.



- RAS3611-HD
by:

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!



- RAS3611-HD
by:

I am very happy with the system. Does exactly what it says it will. I pull a 38' 5th wheel and it would cause havoc with the stock springs. I put these on and noticed an immediate improvement to the bounce while towing my camper. Very easy install. Thanks I would purchase again if I replace my current truck.



- RAS3611-HD
by:
Roadmaster

The service was excellent. I ordered my roadmaster active suspension on Wednesday and it was delivered to my house by noon the following Friday. I will order from etrailer again for future needs.



- RAS3611-HD
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Ram 2500

Very easy install, the directions are great. Made a bit of a difference on the truck ( 2021 GMC 2500 Duramax AT4) I’ll know better when I hook up the 5 th wheeel.



- RAS3611-HD
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It works well, after putting it on, the truck settled 1 inch versus 3 inches before. it makes for a level ride.



- RAS3611-HD
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Great service. Item came in two days earlier than anticipated. Item was in great condition ready to install. Now if only the weather will cooperate. Thanks.



- RAS3611-HD
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Love the extra lift this suspension gives for when I haul my fifth wheel.



- RAS3611-HD
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Excellent customer service and expedited delivery



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- RAS3611-HD
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1999 Ford F-250 and F-350 Super Duty



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- RAS4611
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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

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


- RAS3611
by:

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.



- RAS3611-Y
by:

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


- RAS3611-YHD
by:

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.



- RAS4514-SAT
by:

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


- RAS3611-YHD
by:

Review from a similar RAS in Vehicle Suspension


etrailer asked if I would review the roadmaster active suspension kit after a year. Ok, I get a lot of junk email but this impressed me. This shows that they are a stand up company. I purchased this product to help with the sag I was getting at the hitch. I read a lot of articles and literature about the sagging issues and almost went with an air system as they are described as the end all be all fix. WRONG! I installed this RAS on my 2018 F150 and the sag was gone. It has never returned. The trailer rides true behind my truck and my truck rides great when I’m not hooked up. I have max towing capability with my truck from the factory but I pull a 10,000 lb trailer. Lot of concrete grinding equipment, big vacs, generator and I haven’t had any issues at all. The Roadmaster active suspension works just as advertised. I’m very happy with the purchase and I’ll do it again on my next truck.



- RAS4514-SAT
by:

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



- RAS3611-B
by:

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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Ask the Experts about this RAS Vehicle Suspension

  • 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 Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit. There are two options for you, depending...
    view full answer...
    Image 1 for
  • Recommended Suspension Enhancement Without Air Bags for 2019 Chevy Silverado 3500 Duramax
    We have just what you're looking for in the Roadmaster Active 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...
    view full answer...
  • Will the Roadmaster Active 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 Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-HD will not work with overload leaf springs but the Roadmaster Active 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.
    view full answer...
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  • Difference Between Roadmaster Active Suspension Kits for 2020 GMC Sierra 2500
    For your 2020 GMC Sierra 2500 the difference between the HD versions of the Roadmaster Active Suspension kits is that the part # RAS3611-CHD fits vehicles with overload springs whereas the # RAS3611-HD fits versions without the overload springs. These kits would work great with a rear sway bar like the # RM25FR as well. The two kits together would offer really great sway reduction and handling improvements.
    view full answer...
  • Which Roadmaster Active Suspension Leaf Spring Enhancement HD Kit Fits 2010 GMC Sierra 1500?
    I have another option for you, but the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD are only confirmed to fit the 2500-3500 models of the GMC Sierra and will not fit your 2010 GMC Sierra 1500. Instead I recommend the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS54FR which is confirmed to fit your Sierra 1500 and has the same 3000lb load rating as the kit you were looking at. The RAS is a great option as...
    view full answer...
  • Correct Roadmaster Active Suspension Kit for 2001 Ford F-350 Super Duty
    Yes, the correct Roadmaster Active Suspension Heavy Duty kit for your 2001 Ford F-350 Super Duty is part # RAS3611-HD, which fits single and dual rear wheel models regardless of cab size. Just note that if your truck has factory overload springs (located above the pack of leaf springs), they must first be removed before the kit can be installed The HD kit is best for trucks that typically experiences squat of +2-3 inches when loaded and/or trailer has a tongue weight of 600 lbs or more....
    view full answer...
  • Roadmaster Active Suspension Kit Recommendation for 2015 Chevy Silverado 2500HD
    For your 2015 Chevy Silverado 2500HD we have the Roadmaster Active Suspension kit part # RAS3611-HD as a confirmed fit. This will give you an additional 3,000 lb of suspension support which will greatly reduce the sag you are still seeing.
    view full answer...
  • Suspension Enhancement for 2019 Chevy Silverado 2500
    I have a really great option for you but at this time we do not have an add a leaf setup for your truck. The Roadmaster Active Suspension kit part # RAS3611-HD performs in a very similar way and can provide up to 3,000 lbs of additional support. Unlike other similar suspension kits this improves ride quality whereas others are known to make it harsher.
    view full answer...
  • 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 Roadmaster Active 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...
    view full answer...
  • Will a Suspension Enhancement System fit a 2015 Chevy 2500 HD long bed crew cab with 6" of Lift
    I did contact Roadmaster and the Active Suspension Custom Leaf Spring Enhancement Kit # RAS3611-HD is confirmed to fit and does not require additional parts to install. These suspension enhancement systems are designed to fit stock vehicles, without any aftermarket suspension modifications. Regarding lifted trucks, an issue may arise if the lift block is fabricated in an odd shape that interferes with their axle connecting brackets that are part of the kit. Another scenario that's...
    view full answer...
  • RAS3611-HD for 2017 Nissan Titan XD Trim Level S
    I would not recommend the part # RAS3611-HD for your 2017 Nissan Titan XD. This kit is designed for heavier duty vehicles so it would make your suspension harsh. The part # RAS3611 is the correct kit you'd want. It will give you the suspension support you want and won't make the ride harsh. The roller does have to be permanently removed though. I attached a picture that shows that step of the instructions for this kit. The roller has to be removed so that the spring of the RAS can lay...
    view full answer...
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  • Determining If RAS Leaf Spring Enhancement Kit RAS3611-HD Will Fit 2007 Chevy 2500HD Classic
    The Roadmaster Active 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...
    view full answer...
  • Will Roadmaster Active Suspension Heavy Duty Kit Work On a 2016 GMC Sierra Denali 2500
    Thank you for the picture! The overload spring that the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD is referring to is located on top of the leaf spring pack. Based on the picture you provided, you will be able the install the Roadmaster Active Suspension # RAS3611-HD with no problems. I included a video of the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD for you to take a look at.
    view full answer...
    Image 1 for
  • Best Suspension Enhancement for 2006 Ford F-350 Towing Fifth Wheel and Carrying Camper
    The best suspension enhancement for your 2006 Ford F-350 for both support, ride quality, and stability is the RAS part # RAS3611-HD. With most kits you end up having to sacrifice ride quality to get the support and stability but with the RAS systems you get improved ride quality and handling as well as the support (which is adjustable) so it's by far the best option.
    view full answer...
  • Will Roadmaster Active Suspension Kit Reduce Sag in 2017 GMC Sierra 2500?
    Though there is not a specific number I can offer, what I can tell you is that the Roadmaster Active Suspension Kit # RAS3611-HD is designed to level your 2017 GMC Sierra 2500 under a maximum 3,000 lb load. So what will happen is you will no longer experience the 1" of sag you said you were encountering, though your trailer will ride an inch higher in front. This is going to be true regardless of the suspension enhancement though there may be a solution. If you haven't already, unbolt...
    view full answer...
  • Will Roadmaster Active Suspension Raise the Height of a 2000 Ford F-250
    Installation of the Roadmaster Active Suspension system # RAS3611-HD will not increase the unloaded ride height of your 2000 Ford F-250. When loaded if the truck were to normally squat the RAS will prevent that from happening.
    view full answer...
  • Recommended Suspension Enhancement System For 2016 Chevy Silverado 2500 With Future Lift
    On your 2016 Chevy 2500 Duramax Crew Cab Standard Box, the Roadmaster Active Suspension Kit # RAS3611-HD will be a great addition. It will work on your truck even if it doesn't have the factory overload spring. This kit will have a 3,000 lb capacity which means it will function correctly up to that weight capacity, but it does not increase the weight carrying capacity of your factory suspension system. It has a patented design that eliminates bottoming out, axle wrap, wheel hop, and...
    view full answer...
  • Will Roadmaster Active Suspension Kit Increase Hitch Capacity of 2009 Ford F-250
    The Roadmaster Active Suspension Kit # RAS3611-HD referenced in your question is confirmed to fit your 2009 Ford F-250, as long as it does not have the factory top overload springs. This heavy-duty kit will do a much better job of supporting the truck's capacity compared to the factory suspension, but it will not actually increase the hitch/tongue weight capacity of your F-250. This is the case with any aftermarket suspension enhancement system. Generally speaking, no aftermarket products...
    view full answer...
  • Can Roadmaster Active Suspension Be Used on Front Leaf Springs on Vehicles that Have Them
    I spoke with my contact over at Roadmaster Active Suspension. He said not to use it on front leaf springs because there are so many other moving parts at the front end and they do not test them or rate them for use at the front. If your truck is 4-wheel drive there is another option for adjustable suspension enhancement. You could use Firestone air bags # F2223. It also costs less that the active suspension system.
    view full answer...
  • 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 Roadmaster Active 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...
    view full answer...
  • Would Install of Roadmaster Active Suspension Kit Cause Driveshaft Angle to Change
    The pinion angle would slightly change if you installed a Roadmaster Active Suspension kit part # RAS3611-HD and you were using enough suspension support to change the ride height but it would not be enough of a change to require to change anything. You would not need to make any changes to compensate for this.
    view full answer...
  • Will the Roadmaster Active Suspension Kit Fit a Lifted 2005 Ford Excursion 4x4
    The Roadmaster Active Suspension Kit will work on a lifted vehicle as long as the factory leaf springs have remained intact and unmodified. There are few lift kits that would prevent this system from being able to be used. However, part # RAS3611-HD is not a confirmed fit for your 2005 Ford Excursion 4x4. Instead, you will want to use part # RAS3621 which is a confirmed fit and would work well for you.
    view full answer...
  • Suspension Enhancement that Fits 2009 Freelander 2130
    We have great suspension enhancement that fits your 2009 Freelander 2130 like with the part # SSR-206-54 but there isn't a RAS system that fits your RV. The SumoSprings kits do offer similar support and ride quality as the rAS kits so this would be a great option.
    view full answer...
  • Will the Roadmaster Active Suspension RAS3611-HD Fit a 99 F-350 Dually with Top Overload Springs?
    The Roadmaster Active Suspension # RAS3611-HD will definitely fit your 1995 Ford F-350. This includes models with dual rear wheels. However, installing this will require permanent removal of the top overload springs as this will essentially replace them. This will also supplement your stock suspension very nicely and should help with ride quality and towing experience.
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  • Suspension Enhancement Recommendation for 2003 Chevy Silverado 2500 HD 4WD
    You would get suspension support for your 2003 Chevy Silverado 2500HD with a Timbren setup but the ride quality will be pretty harsh so I have a different route I'd recommend first with the Roadmaster Active Suspension System part # RAS3611-CHD for if you have factory overload springs or part # RAS3611-HD for if you do not. This will give you all of the same support as the Timbrens but will improve the ride quality and handling unlike the Timbren which will be pretty harsh. Now if you...
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  • Recommended Roadmaster Active Suspension for a 2015 GMC 2500
    With your 2015 GMC Sierra 2500 not having the overload springs on the top, the Roadmaster Active Suspension # RAS3611-HD will be the correct ones for you.
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  • Recommended Suspension Enhancement for 2004 GMC 2500HD with Quadrasteer
    I may have a solution for you to help upgrade the suspension on your 2004 GMC Sierra 2500 HD, but there are not any air bag kits that are compatible with the trucks that have Quadrasteer. However, you could use the Roadmaster Active Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty # RAS3611-HD, which will convert your leaf spring suspension to a mechanically active suspension system and help reduce sway and body roll when you're carrying your cab over camper. Similar to airbags,...
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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 Roadmaster Active Suspension. The correct one will depend on if your '04 Silverado has the factory top overload springs or not: - Without Top Overload Springs: Roadmaster Active Suspension Custom Leaf Spring...
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  • Recommended Rear Suspension Enhancement For 2021 Chevrolet Silverado 3500 Towing 5th Wheel Trailer
    The Timbren Rear Suspension Enhancement System # TGMRCK25D you were looking at are confirmed to fit your 2021 Chevrolet Silverado 3500 towing a 16000lb 5th wheel trailer and will offer plenty of support, but will leave you will a very stiff ride when the truck is unloaded. Instead the best option is an air helper spring kit like the Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle # AL57341 which will provide up to 5000lbs of load leveling support when you are towing, but can...
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  • Best Suspension Enhancement for 2021 Chevy Silverado 2500
    The best suspension enhancement we offer for your 2021 Chevy Silverado 2500 is the Roadmaster Active Suspension kit part # RAS3611-HD which will give you the support you want but also improves handling and ride quality. Most similar kits to this actually make the ride quality rougher so this would be the best option.
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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Mary E
Written by:
Mary E
Employee Noah M
Updated by:
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