bing tracking image
  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
RoadActive Suspension Custom Leaf Spring Enhancement Kit

RoadActive Suspension Custom Leaf Spring Enhancement Kit

Item # RAS3611-Y
Our Price: $539.00
Vehicle Suspension

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 30 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
2,000-lb Capacity. Convert your vehicle's leaf springs into a mechanically active suspension system. RAS adjusts to your load to level your ride. The system also increases stability, handling, and control by improving traction and reducing sway. Great Prices for the best vehicle suspension from RAS. RoadActive Suspension Custom Leaf Spring Enhancement Kit part number RAS3611-Y can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (729)
  • Q & A (0)
  • Photos

RAS Vehicle Suspension - RAS3611-Y

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

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.


  • 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


  • Weight capacity: 2,000 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-Y RAS Custom Active Suspension System for OEM Leaf Springs - Rear Axle

Installation Details RAS3611-Y Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

RoadActive Suspension Custom Leaf Spring Enhancement Kit - RAS3611-Y

Average Customer Rating:  4.7 out of 5 stars   (729 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.


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.



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

2017 Ford F-150

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.



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

2020 Ford F-150

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.

Jim S.


Its been about a year since adding this to my truck. It still works great and does keep the truck level when hooked up to my trailer. I actually just spray painted it yesterday, 230504, for preventative maintenance.


This system is amazing. Installed on a Ford F-150 2019. Very easy to install in my driveway with basic tools. Instant improvement in handling around the town, way more planted feel and cornering improvement. Main reason I installed was to improve towing a boat and travel trailer. Wow this thing really worked and truck rode higher in the suspension. Overall great product. Only limitation is really heavy load, took them off and installed airbags to level for heavy loads. Very bummed this would not work with the airbags installed.


2016 Ford F-150 XLT 4x2 - We would get a gallop when we would be towing our travel trailer and after reading several reviews for the Roadmaster Active Suspension System we decided to purchase the system. Just like most of the reviews it took more time to jack up the truck and remove the wheels then it was to install the system. It did raise the bed of the truck about an inch. Anyone who owns a late model F-150 will tell you that it rides just like a sedan. It was no different after the installation. I did take a short drive with the trailer attached and it was a smooth ride (no gallop). At this point I would consider this a success. The one thing that I would like to point out is if you have the same F-150 model that I have I would purchase RAS3611-B not RAS3611-Y. The “B” model has a block that covers the emergency brake bracket on the passenger side install.


I have not put them on my truck yet. The product was delivered today and the email to submit my came the same day. I will try to review them again after getting them on my truck.

David P.


I used the product extensively last year while pulling a heavy loaded enclosed cargo trailer. Without the RAS this trailer would squat my F150 way down. This item was very easy to install. It took longer to jack my truck up and get it on stands and remove the rear wheels than the time it took to install this item. With the RAS dialed up to its fullest potential my truck only squatted less than one inch. I was very pleased with how it performed. Once I quit towing the trailer and sold it, I rotated my tires during an oil change and dialed the RAS back down to a more comfortable ride setting. It is nice knowing I have this if and when I may need it again.

2013 Ford F-150

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


Awesome product. I just bought my F-150 in July and quickly realized it needed something to assist with rear sag while towing or hauling any weight in the bed. After much research, this is the perfect product. It was simple to install so will be simple to remove if needed. My truck used to feel loose in the steering but now feels more planted while driving at all speeds. Super happy!


This leaf spring enhancement was a great alternative to installing expensive air shocks to assist with off setting the tongue weight of my travel trailer. Overall pulling stability of my F150 was greatly improved and etrailer was available to answer questions and shipped this product promptly.


Not to happy with the RoadActive suspension leaf spring kit. I loaded them on a 2017 f-150 with a 6” lift to pull a 6000lbs bumper pull trailer. Still squats pretty good even with the RAS torque to the highest/Safest tension and also quite a bit of bounce in it. I do have a weight safe brand adjustable ball hitch to try to counter the Small height from the lift. I do like the look of it on but don’t feel to safe towing the trailer

Etrailer Expert

Jenny N.


I reached out to the manufacturer about your experience and they did have a few suggestions. They advised that the HD version that is rated for 3000 pounds part # RAS3611-YHD, might have been a better option. It would be a fit for the 2017 Ford 150. They also advised that if you have set the tension at the suggested 2mm black disc there is still room for an additional tension setting. The absolute max tension that can be set on the spring, is 3mm gap between the coils of the spring. This would be the white and black disc together, keep in mind adjustment must be made with truck in the air - axle hanging free.

Ford F-150

This product was very easy and quick to install. It changed the ride on my wife's lifted F150 so much and was noticable immediately. It firmed up the ride and made it way more comfortable towing, loaded, or just plain driving.


1 year with RAS and I believe it's a great product. It helps distribute weight and increases towing confidence. Using RAS with heavy tongue weight significantly reduced bouncing effect compared to OEM.


I live in Canada, on Vancouver Island, and I have say how good etrailer's service has been. These arrived within a week, and although shipping isn't free to Canada, it is not at all unreasonable. I installed these on my 2015 F-150 to help with the sagging we were experiencing when it and the travel trailer we pull are fully loaded. While I haven't had a chance to test them with a full load yet, I am really pleased with the ride and handling of the truck while empty and I have them set to the maximum setting. Finally, they were super easy to install!

Ford F-150

2013 f150 eco- Went to a toy hauler over 7000 lbs, 150's suspension too lite for this job even tho the power plant is more than capable. Pulled the unit on a 3000 mile adventure without my sidexside. Everything went okay however very aware the truck was over matched. I added these spring tensioners' after the trip and noticed an immediate improvement. The truck tracks much better especially in curves and downhill and I feel very much in control now. I would still recommend a heavier truck for these larger trailers but for those of you like me this is the ticket.
Installation like the instructions state by far the easiest job out there. I am a 70 year old plunker so by nature I work very slow, this job took me about 1/2 hour a side. I highly endorse this product.

John F.


Update my toy hauler actually weighs 11000lbs with the kit my truck handles the trailer well. I would not take it on cross country adventure howere staying in the west it works fine. I thought about upgrading to a 1 ton truck, after much research the cost no way warrents the gain and is negated by the fact my truck gets 18 - 23 mpg when not towing and my 7 -8 mpg is as good as the 1 ton gas rigs which have no more power than me mine being better then some. The cost for diesel rig is too great, traveling a 1000 miles once in awhile followed by 100 mile range camping trips my v6 turbo does great and the money is still in my wallet. I have not found a hill that I cant pull at 60 on cruise. Maybe I70 Utah to the Eisenhower tunnel Colorado would slow me down, I wouldnt pull this big trailer with my inproved suspension f150 up that freeway anyway. The trailer does not push me around and tracks great with the installed kit.

Ford F-150

Worth every cent. Very good for additional stability, helps reduce drop when trailering. Pulled our 6800# travel trailer to Alaska with our Ford F150, and truck and trailer took a beating, 19000 miles. Easy install.

2018 Nissan Leaf

So far, so good.
The Roadmaster Active
Suspension Custom Leaf Spring Enhancement Kit I ordered was shipped the same day and arrived about a week later. It came assembled as advertised. It took me about an hour to install on my 2018 Ford F-150. There were no surprises and the instructions were pretty straight forward and simple. The only thing I wished for was a better explanation between the 25% and the 40% tension setting on the spring.

The is a noticeable difference in the handling of the truck. Although the ride quality is hard to quantify, I can certainly feel a difference when cornering, as the truck takes a flatter line with hardly any noticeable roll. I purchased this kit to aid in tail sag and handling when towing my 28ft RV. I will tackle the first tow this coming weekend and can offer a new review then. So far, I am completely satisfied.

Michael S.


Still No complaints. Still no surprises. Works as advertised.


Excellent system for towing or just to tighten up the handling. Installation is super simple after getting the wheels off and setting the tension is simple. I set mine about halfway between the small and large spacer and it has helped tremendously with sag from our travel trailer. Works great in unison with the weight distribution hitch. Raised the rear noticeably, but now sits perfectly level when towing. Will purchase again for all my future towing vehicles.

2015 Ford F-150

Product was very easy to install. Very well made. It took me about 35 minutes to install both sides once the truck was on Jack stands. Product did raise the rear of my truck a little. Can't say how much because I forgot to measure before I started. Truck still rides nice, no harshness or strange noises. I purchased the roadmaster active suspension to help eliminate squat and improve driveability while towing our 7500lb travel trailer. Hopefully I will get to try it out with the trailer soon.



RAS is still working great . I have to make a correction. Our trailer is 8005lbs empty and it is a pull behind not a fifth wheel. Tongue weight is about 900lbs with my motorcycle in the garage and the garage is in the front. When used in conjunction with my weight distributing hitch, my truck rides great and handles great.

2010 Ford F-150

This was reasonably priced, compared to the other options. Easy to install and made a noticeable difference in stability towing an 8-9K trailer with a 2010 F-150 FX4. I do notice the stiffness in ride unloaded but I think it's worth it.

2014 Ford F-150

It's been about a year since I installed the RAS, still as happy today as I was then. Bought it mostly to help with towing but found it helpful for everyday driving and hauling material in the bed. Customer service has been good with etrailer on all questions and installation tips / instructions.

2020 Ford F-150

Seems to perform well. Easy install.

2013 Ford F-150

I’m impressed by the quality and engineering of this product. The person who designed it should win an award! I installed this on my 2013 F150 in preparation for hauling around my 1998 24’ coachman I’ve been working on fixing up all winter. I didn’t want a solution that would stiffen up the trucks ride because it’s very comfortable. I can’t feel any change in ride. Installation was very easy, took about an hour for everything and just a few tools. I haven’t towed with it yet but I did hook my trailer up and it didn’t squat like it did before. So far, very impressed. I’m glad I didn’t mess with airbags and all.

Randy H.


I love this product. It has exceeded my expectations. I absolutely recommend this product as an effective, efficient and simple solution for towing.


I have a 2016 F-150 4x4 with a 2 inch leveling kit and 305 tires. I am towing a 26RR Grey Wolf camper. I beleave it is 4992 lbs dry wait and 7775 lbs loaded. It is meant to be pulled with 1/2 ton trucks. Want to give all specs to be fair to the product. The product was easy to install. I adjusted spring to the black disk. When I hooked up the camper I notice my truck definitely squated less. The towing ride was less bumpy. That is it. It definitely did not improve fuel mileage. I am still at 8.5 miles to the gallon. That is on flat ground, I live in Florida. Still could not go over 65mph without camper feeling loose on the road. 3 stars for now until I tow other trailers. It was an improvement but not as much as I was expecting. Still going to go truck shopping for a bigger truck to solve my towing needs. Side note: truck looks great and rides way better without a trailer in tow. 2/22 inf

Etrailer Expert

Victoria B.


The Roadmaster Active Suspension is designed to improve your trucks stability, handling, and control by keeping the truck level even when youre towing. When you say that your camper feels loose on the road, it sounds like your trailer starts to sway at speeds above 65 mph. The best solution for keeping your trailer tracking straight while rolling down the road is to use a weight distribution system with sway control. A weight distribution system will not necessarily improve your fuel mileage, but it will improve your experience towing your 30ft trailer. I have linked a help article on Weight Distribution systems for more information.

2014 Ford F-150

Just like your advertising said they were very easy to install. My ride has not been affected it still is a great ride for a truck. After the installation the rear end of my truck was 2” higher which will help when I hook up my camper, instead of sagging now my truck is level they are a great product . Thank you

2023 Winnebago Minnie Travel Trailer

Very easy install. Unloaded ride feels pretty good. Looking forward to towing with it.

Show More Reviews

See what our Experts say about this RAS Vehicle Suspension

  • What Is The Right RoadActive Suspension Enhancement Kit for my 2021 Ford F-150
    We have two options for your 2021 Ford F-150, the RoadActive Suspension Custom Leaf Spring Enhancement Kit - Standard Duty, # RAS3611-Y or, the Heavy Duty # RAS3611-YHD. The reason to choose this system is because it continually reinforces your F-150's current leaf spring suspension. The force normally put on your truck's suspension is transferred to the RAS Enhancement Kit, allowing your leaf springs to work normally. So they work to keep you level, help with body roll when you turn,...
    view full answer...
  • Can RoadActive Suspension Kit be Used with Weight Distribution Hitch
    Yes, the RoadActive Suspension kits like the # RAS3611-Y work perfectly fine with weight distribution systems. They both work to fight and prevent suspension sag when towing so they complement each other well.
    view full answer...
  • Correct RoadActive Suspension Kit for 2020 Ford F-150
    For your 2020 Ford F-150 the correct RoadActive Suspension Custom Leaf Spring Enhancement Kit is part # RAS3611-Y if you have 4WD or # RAS3611-B if you have 2WD. Please just note that neither option will fit the Raptor models. This is a really great system that will do a nice job of leveling out your ride and increasing stability on the road, especially when hauling cargo or towing a trailer. It's going to secure under the factory leaf springs and around the U-bolts to essentially convert...
    view full answer...
  • Can RoadActive Suspension Kit Install on 2016 Ford F-150 with a Lift
    The RoadActive Suspension Kits like the part # RAS94FR will work great on your 2016 Ford F-150 that has a lift kit installed. This is the correct kit if you have a 2 wheel drive model. If instead you have a 4 wheel drive model you'd want the part # RAS3611-Y. Since these attach to the leaf springs they are not affected by a lift kit.
    view full answer...
  • Can the RoadActive Suspension RAS3611-Y Fit a 2011 F-150 With Leveling Blocks Installed?
    As the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y will attach to the top of your leaf springs and your leveling blocks are installed under your leaf springs, there will no issues installing these. However, I do need to say that the # RAS3611-Y is designed for use with a 4 wheel drive 2011 F-150, so if you have a 2 wheel drive model, you will need the # RAS3611.
    view full answer...
    Image 1 for
  • Which RoadActive Suspension Kit Fits 2014 Toyota Tundra
    RoadActive Suspension does offer a kit that fits your 2014 Toyota Tundra with the part # RAS4611TD but the part number you mentioned does not fit your truck.
    view full answer...
  • Recommended Rear End Suspension Upgrade on 2019 Ford F-150 for Towing
    The RoadActive Suspension Custom Leaf Spring Enhancement Kit part # RAS3611-Y is a great option for a 2019 Ford F-150 and it will work great to combat rear end sag and as well as proposing. It does not require any modifications to install and it's maintenance free so you don't have to worry about adding air for example like you would for airbags. IT can be adjusted for your specific load so you get the best combo of support and comfort. I saw you were looking at Timbrens which are another...
    view full answer...
  • Recommended RAS Leaf Spring Enhancement Kit for 2018 Ford F150 4WD Towing 37 Foot Travel Trailer
    RoadActive Suspension offers two different kits for the 2018 Ford F150 4WD, part # RAS3611-Y which offers up to 2000 lbs of support and the # RAS3611-YHD that you'd looked at, which offers up to 3000 lbs of support. If you're simply looking to support the trailer's tongue weight, I'd recommend going with the lower-rated # RAS3611-Y unless you haul a lot of heavy cargo in the truck bed while towing. If that's the case, the higher rated # RAS3611-YHD would work better. I've linked to a...
    view full answer...
    Image 1 for
  • Adding Suspension Helper Springs to Reduce Sway on a 2017 Ford F-150 Short Bed
    What kind of trailer are you towing? The best thing to use to prevent sway is a weight distribution system with built in sway control. If you are interested in that then let me know the gross trailer weight if it is a travel trailer (bumper pull). If it is a 5th wheel or gooseneck trailer then there is no sway control for those. For your truck though adding some suspension enhancement will help some. RoadActive suspension # RAS3611-Y is a good option because it does offer some adjustability...
    view full answer...
  • Recommended Suspension Enhancement for 2018 Ford F-150 to Reduce Trailer Squat
    Since ride quality when you're not towing with your 2018 Ford F-150 is a concern I recommend the RAS kit # RAS3611-Y. It fits the 4-wheel drive F-150. RAS systems fit on the factory leaf springs to strengthen them. The use coil tension to activate when extra weight is on the suspension but aren't activated without the additional load so the unloaded ride isn't compromised. I've linked the install details and a video for you to take a look at. They bolt right onto your truck's springs...
    view full answer...
    Image 1 for
  • Suspension Helper Springs to Reduce Sway on a 2020 Ford F-150
    The best suspension enhancement kit for your 2020 Ford F-150 that is going to help reduce body roll and sway as well as give your truck the added support it needs is the RoadActive Suspension Custom Leaf Spring Enhancement Kit. The reason this kit is superior to the rest is because it is what is known as an "active" system, which means that it is constantly reinforcing your F-150's original leaf spring suspension. Because of where it installs (see accompanying photo) the force normally...
    view full answer...
    Image 1 for
  • Recommended Suspension Enhancement for 2016 Ford F-150 with 1,500 Pound Trailer Tongue Weight
    The 1,000 pound capacity SumoSprings Solo Custom Helper Springs # SSR-117-40 for 4 Wheel Drive and # SSR-116-40 for 2 Wheel Drive referenced in your question will offer a smoother empty ride in your 2016 Ford F-150 than a higher rated alternative spring. It is important though to keep in mind that any weight coming from behind the rear axle of your F-150 and from the trailer hitch itself should also be considered when choosing a suspension enhancement system, as this will be included to...
    view full answer...
  • Towing 6,000 lb Camper With 2018 Ford F-150
    If your truck and hitch can handle the weight of your camper, you can haul it with your 2018 Ford F-150. The RoadActive Suspension enhancement kit # RAS3611-Y will fit and help your truck from sagging. Even though it is only about 30 miles away you do want to make sure you're hauling safely. If your trailer isn't set up right, those 30 miles could feel like 300. I use the etrailer trailer tongue weight scale # e99044. Get it level and position your gear in there to get your tongue weight...
    view full answer...
  • What Suspension Enhancement do I Need to Help Extend Leaf Spring Life on My 2022 Ford F-150?
    The absolute best way to help prolong your leaf springs on your 2022 Ford F-150 is with the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-Y (2k load leveling capacity) or the heavy duty # RAS3611-YHD (3k load-leveling capacity). With the custom leaf-spring enhancement kit, not only will you get a smoother ride (with or without cargo), you will also have the comfort of knowing that the kit does not require any additional maintenance once they are installed on your truck....
    view full answer...
  • Recommended Suspension Enhancement for Leaf Spring Shudder While Towing with a 2014 Ford F-150
    Since the issue is with your leaf springs flexing I recommend using a RoadActive Suspension (RAS) Custom Leaf Spring Enhancement Kit for your 2014 Ford F-150 as opposed to a Firestone Ride-Rite kit. The reason being that the RAS gives support directly to the leaf spring while the Firestone alternative will only come into play once when your vehicle is under load. If you have a 2WD then you need the kit # RAS3611 but for a 4WD you need the kit # RAS3611-Y. Please note that neither of these...
    view full answer...
  • Best Suspension Enhancement Kit for 2019 Ford F-150 That Requires no Maintenance
    The best suspension enhancement system for your 2019 Ford F-150 is the RoadActive Suspension Custom Leaf Spring Enhancement Kit because it works continually to reinforce your leaf spring suspension, will not impact your unloaded ride, and requires zero maintenance after you install it. The correct RoadActive Suspension Kit for your 2019 Ford F-150 will depend on if you have a 2-Wheel Drive or 4-Wheel Drive: - 2-Wheel Drive: RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3611-B -...
    view full answer...
    Image 1 for
  • Does RoadActive Suspension RAS3611-Y Fit 2014 Ford F-150 With 3 Lift?
    That will really depend on how your 2014 Ford F-150 was lifted 3". As long as the factory leaf spring is still there then the RoadActive Suspension Leaf Spring Enhancement Kit # RAS3611-Y you were looking at will fit perfectly. This kit adds 2000lbs of load leveling support to your rear suspension, and does a fantastic job of preventing sway and body roll when driving. If your lift uses a different leaf spring this may still work, but it will be dependent on if the leaf spring has the...
    view full answer...
  • Is RoadActive Suspension System Compatible Wtih 2021 Ford F-150 With Auto-Leveling Headlights
    I spoke with the folks at RoadActive Suspension and was told that because the RAS system sits within the footprint of the leaf springs, it will not interfere with the sensors for the Auto Headlight feature, but you will need to move the adjustable cross-bolt from its spot at the end of the bracket to the second to last holes as shown in provided photo. We offer 3 different RoadActive Suspension Kits for the 2021 Ford F-150. I'll list the fits below: • Part # RAS3611-YHD for 3000 lbs of...
    view full answer...
    Image 1 for
  • Is There a Heavy Duty Option of RoadActive Suspension For a 2012 Ford F-150
    As long as your 2012 Ford F-150 is not a Raptor edition, then you can definitely use the heavy duty RoadActive Suspension system. For this, you will need the # RAS3611-YHD and it will give you up to 3,000 pounds of load leveling capacity. However, if you wanted something with more capacity and the ability to adjust the system, I highly recommend the Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle # AL57200. These will have a load-leveling capacity of up to 5,000 pounds at 100 psi,...
    view full answer...
  • Best Suspension Enhancement System for a 2020 Ford F-150
    Between the RoadActive Suspension System item # RAS3611-Y and the SumoSprings Rebel Custom Helper Springs item # SS95QR for your 2020 Ford F-150 I recommend the SumoSprings. These springs will keep your F-150 level when you're towing or hauling a heavy load and won't effect your ride quality when you are not loaded down. This system will work great with the Equalizer Weight Distribution System item # EQ37120ET you are currently using.
    view full answer...
  • Sway Control Options For A 2017 F-150
    I do have a sway control option available for you, however, the Roadmaster Rear Anti-Sway Bar for Pickup Trucks part # RM-1139-177 is not confirmed to fit a 2017 F-150. Instead, I recommend using RoadActive Suspension Kit part # RAS3611-B for 2WD and part # RAS3611-Y for 4WD models. The RAS system works to not only reduce sway but also eliminates bottoming out, axle wrap and wheel hop. I have attached a video review of this product for you.
    view full answer...
  • Recommended Suspension Helper Spring Options to Reduce Sway on 2020 Ford F150 4WD
    The best solution for you will depend on when you're experiencing the sway. The Timbren Aeon springs you'd looked at, part # TFR1504E do a good job with the suspension, but will only come into play once the truck's suspension is under load and it's really not going to do much to prevent sway unless the suspension is compressed-even then there are better options. We really like the RoadActive Suspension Leaf Spring Enhancement Kit, like # RAS3611-Y. This system helps level your front and...
    view full answer...
  • Suspension Enhancement For a 2017 Ford F-150 With a 6 Lift
    On your 2017 Ford F-150 with a 6" lift the RoadActive Custom Leaf Spring Enhancement Kit Item # RAS3611-Y is compatible if you have a block lift. If your vehicle has a spring lift it is not going to be compatible. These can be installed with the vehicle on the ground. The instructions recommend taking the wheels off to make the instillation easier.
    view full answer...
  • Recommended Suspension Enhancement for 2017 Ford F-150 with Roll Out Tool Box
    I have a solution for you, but the RoadActive Suspension kit # RAS3611-Y is probably going to be a bit of overkill and I would only recommend it for trucks that tow larger 5th wheel trailers or often test the limits of the payload capacity. Instead, the Sumo Springs Solo Custom Helper Springs # SSR-117-47 would do a great job and provide you with 1500-lbs of support for your rear end; this would be more than enough for the 600-lbs of your tool box and the 450-lbs or so when towing the boat....
    view full answer...

< Previous
123. . .7

Do you have a question about this Vehicle Suspension?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Updated by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Alex H
Updated by:
Alex H
Employee Isabelle B
Updated by:
Isabelle B
Employee Noah M
Updated by:
Noah M
Employee Mary K
Written by:
Mary K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Conner L
Test Fit:
Conner L

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924