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  1. Vehicle Suspension
  2. RAS
  3. Leaf Springs and Helper Springs
  4. Towing/Load Leveling
  5. Rear Axle Suspension Enhancement
  6. Heavy Duty
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2016 Chevrolet Colorado
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RAS

RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty

Part Number: RAS3623-HD
In Stock
$589.00
Vehicle Suspension
Not Confirmed to Fit

2016 Chevrolet Colorado

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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. Great Prices for the best vehicle suspension from RAS. RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty part number RAS3623-HD can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (632)
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RAS Vehicle Suspension - RAS3623-HD

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • 3,000-lb Load Support: Keeps your truck level when towing or hauling for safer, steadier control.
  • No Upkeep Needed: Once installed, it works automatically without air pressure checks or adjustments.
  • More Stable Handling: Reduces sway, body roll, and bounce so your ride feels planted on curves and highways.
  • Protects Suspension Parts: Prevents bottoming out and axle wrap to extend the life of springs and shocks.
  • Easy Bolt-On Install: Mounts under factory leaf springs with no drilling, cutting, or welding required.
Made in USA

Features to know about

Stay Level Under Heavy Loads: 3,000-lb Rear Suspension Support

Hauling heavy trailers or loading up the bed can make the rear end sag and steering feel light. The RoadActive Suspension Custom Leaf Spring Enhancement Kit - Heavy Duty adds up to 3,000 lbs of support by turning your factory leaf springs into a mechanically active suspension system. The variable-rated coil tension springs instantly adjust to your load, keeping your ride level and steady when towing or hauling a full payload. With the back end supported, braking and traction stay consistent and confident.

Vehicle equipped with RoadActive Suspension kit maintaining level stance while towing, highlighting improved traction and balanced ride height.

Cut Out Sway, Bounce, and Body Roll: Mechanically Active System

Heavy loads can cause body roll in corners and sway that makes towing a handful. This kit strengthens your leaf springs so they react before those problems start. The mechanically active design reduces sway and body roll while cornering and prevents wheel hop or bottoming out. Whether you’re on the highway, in crosswinds, or backing down a boat ramp, the truck feels planted and balanced.

RoadActive Suspension system installed on rear axle, showing how it eliminates axle wrap and prevents wheel hop on a heavy-duty vehicle.

Smooth Ride When Empty: Automatically Adjusts to Load

You don’t have to trade comfort for control. The coil springs in this system automatically disengage when unloaded so your factory leaf springs perform as they should. That means no harsh ride when empty and no need for adjustments or maintenance once installed. It’s load support when you need it, smooth ride when you don’t.

Stronger Components, Longer Life: Corrosion-Resistant Steel Build

This heavy-duty kit uses high-grade alloy steel with an epoxy e-coat for corrosion resistance, plus brackets rated for more than 800 hours of salt spray testing. By reducing stress on your leaf springs, shocks, shackles, and tires, the RAS kit helps extend component life while delivering lasting support mile after mile.

Easy Bolt-On Installation: Fully Assembled and Maintenance-Free

Each unit comes fully assembled and mounts under the leaf spring using factory U-bolts—no drilling, cutting, or welding needed. Once bolted up, no ongoing adjustments or monitoring are required. Just install it with basic tools and get back to towing or hauling with a stable, level ride every time.

Specs

Weight and Capacity

  • Weight capacity: 3,000 lbs

Warranty

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

3623-THD RAS Custom HD Active Suspension System for OEM Leaf Springs - Rear Axle

3623-HD

Installation Details RAS3623-HD Installation instructions

This Product Fits The Following Vehicles




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




Video Transcript for Let’s Check Out the RoadActive Suspension Custom Leaf Spring Enhancement Kit-RAS34FR

What's up everybody, Adam here with etrailer. Today, we're gonna to be taking a look at a very popular suspension enhancement kit for your truck. And it's the Roadmaster suspension enhancement kit. Be sure to use our fit guide, put your vehicle's year, make, and model in there, and that's going to give you all of the compatible suspension systems that you can get for your truck. So this add-on component isn't going to require us to take any of the factory equipment off, so I really liked that. Buy a new truck, you want a little bit more help with the suspension.

You don't really have to remove anything that's already there, that's kind of cool. So another thing that's nice about that, adding another component that's going to take some of that load is just going to put less strain on your components. So these three leaf springs are handling, let's just say, 5,000 pounds. Now we have a fourth component, so that can be divided by four, instead of three. It's just gonna prolong the life.

It's gonna prevent any axle wrapping, any bottoming out of any sorts. And this is going to be a lot less maintenance than your typical airbags. And the cool thing about it is just like airbags, we can kind of adjust it, but this one we can as well. I actually think that this is a lot smoother than airbags because I've ridden with air bags, with no load on them, and it's like riding just on bricks. It's feels like there's not any suspension at all.

So the coil springs really gonna help that. It does have a powder-coated finish to it as well, so it's not really gonna rust away over time. So, I definitely think that this is probably one of the best things you can get for your truck. And even above airbags. This is also gonna help limit your sway that you might feel whenever you're going down the road, whenever you're hauling something.

A lot of times, whenever your trailer gets off centered, the opposing side of your suspension's gonna kind of correct for that. But having a little bit more support is gonna be good because it's not gonna over-correct and that's when all that crazy sway starts to happen. Also, with air bags, a lot of the times you don't have a whole lot of travel. We're not really limiting our travel here, we're just kind of beefing it up a little bit. With limited travel, whenever you hit bumps and stuff, sometimes you start hopping your back end off of the road whenever we're not hauling something. With this, we're not gonna have to worry about that just because it's just a little bit tighter suspension. It's not really completely locking it in with a set of airbags. Comparing them to upgraded bump stops. A lot of them that we sell are just a little bit bigger than this, so they start to hit the axle a little bit sooner. But, whenever the suspension isn't sagging that much, you're not really getting the benefits of it, because it's only activated when it's under load. So this it's activated and right now. So you don't really have to worry about you getting to that point for your upgrade to start kicking in. With this, you can have it kick in right on the get go. Well I called my buddy Joe and he's to put some weight in the back of the truck. This is about 1500 pounds, give or take, so it's quite the load. Oh wow. I can already see the spring workin'. So this is gonna be very interesting on our test course. Thanks, Joe. You're the best, I really appreciate it. Ooh nice. Right as he lowers it down, I don't know if you can see it on camera, but that spring is definitely workin'. Less load on my leaf springs. That's what we're really going for here. Oh wow. I can definitely tell a difference. My truck is typically not happy with this much weight, but it just feels tighter. Meaning, I just feel like the suspension is doing more sooner, just so I don't hit those overloaded springs down at the bottom. Cause' that's when you can start really messing stuff up, you overload em' too much and then release strings will not work as well anymore. You're looking for the easiest way to beef up your suspension, but also have some adjustability. The Roadmaster suspension enhancement system is gonna be great for any type of truck that you may have. These are definitely something that I would use. And again, this was the Roadmaster suspension enhancement kit, and I'm Adam with etrailer..

Ratings & Reviews

4.7

632 reviews
Review sort icon
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.

by:

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

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



by:

2020 Tundra install that is supplementing a full Icon suspension including upgraded leaf springs. Easy installation process and completed by myself in a short afternoon. Definitely can tell a positive difference in handling even with no load. Pulling the trailer tomorrow to see the real benefits!



by:

Worked well on leveling 1,000 lb tongue weight



by:

I am a competitive shooter and take my camper to all my shoots. I have a cap on my truck and the decked drawer system. I also carry 400 lbs of ammo at any given time. When pulling my camper on the highway or over bumps and railroad tracks it was kinda scary. This system stopped the squat and removed the sag at acceleration. I installed sumo springs as well (without spacer) for added sway control when loaded down with trailer. The RAS was great right from the start. It reminded me of the 80’s then we would put traction bars on old hot rods to stop rear squat on acceleration. Same kind of feel with my truck. Some much nicer. With the trailer it removed 1.5 inches of squat on the rear and got my front and back within 1” of variance and before install it was around 2.5 to 3. Took only fifteen minutes per side to install once the tires were off. Great product….



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!



by:

Installed on my 2016 F-150 XLT. Truck Only Report: I'm very pleased with my unloaded truck ride. My truck now takes bumps much better and feels like it hugs the road better. On my wife's first ride, she said, "It feels like it rides smoother." I agree.

Although I have not towed my travel trailer yet, we will next week, when I hooked it up to my truck, all of my measurements are much better. With my WD hitch connected, all of my truck measurements are very close to equal to the unloaded, pre-RAS, measurements. In other words, with the trailer attached, much truck sits almost exactly at factory unloaded level. I'm really looking forward to giving a good run next week.



by:

The Road Active Suspension is The solution .
2015 F150 EB Max Tow pulling a Lance 1685..
Truck pulls TT with no effort..but was looking for better handling options.
Have many miles without RAS vs Quite a few now with RAS.
The driving and handling is a very welcome improvement… from high mountain passes and roadways to Interstates.. wind… rain … etc
Was contemplating a 3/4 ton… not now.
Easy install.. you won’t be disappointed



by:

Easy Install and everything was in the box. These raised the rear of my truck 1 1/4” and give a stable ride.



by:

Very easy to install and made a big difference. I have 300lbs in the back a d it made it sag. With this on, look like stock height.



by:

Working with etrailer was superb! The RAS system is exactly what my rig needed, it reduced sag and gave me more control when driving with my 2020 F150 4wd crew and 28’ Jayco 7500 # travel trailer! I would highly recommend the RAS system. Easy to install, love it!



by:

Received this yesterday and the directions are very vague for my Dodge pick up, but upon looking at things, it does not work for my truck because it has overload springs. I think all.2001 2500 Rams have the overload springs?
That was never mentioned in the guaranteed to fit my truck, but, This kit cannot be installed if your truck has factory overload springs sitting on top of the main leaf spring pack.
So I guess I will never know how good they actually work.



by:

My husband had some trouble woth the first one with the spring but they are amazing truck didnt move an inch when we put our 5th wheel on it amazing.



by:

Install went smooth, did this myself. Gave my F150 the extra support to be able to tow my half ton rated fifth wheel with the truck sitting level. The unloaded ride is still just like it was prior to install. I used the thin white spacer to set the spring tension.



by:

Works great at leveling my truck with my travel trailer.



by:

I have heard nothing but good things about these enhancement springs so I bought a set. Very easy to install if you have any mechanical ability at all. Haven't used my truck to pull out 5th wheel RV yet but I will in a couple of days. I have a 2500HD it seems to have soften the ride a little. It doesn't make sense but prior to instillation it rode rough like it should, but the springs seem to help. IDK



by:

Finally decided to try the RAS system for the truck since I bought a bigger camper. Ordered it hoping it would get here in time for an install before our new camping trip. Arrived in plenty of time! Opened it up and went through the instructions and got to the install. So, advice…read instructions from start to finish before starting! LOL. I thought they sent the wrong parts and then I read the instructions completely and then said, oh yea, forgot that part. Ha ha. Anyway, there's always a better way to do things based on your situation and vehicle. So after a few different attempts, finally got my groove and install went just fine. As always…take your time, double check everything before tightening down! Anyway, completed the install and then took it for a quick drive. Real happy with it! Felt substantially like it can handle more weight. Will be trying it with the camper next week. Again, thanks to the etrailer peeps for getting it to me on time. Since Murphy's Law resides in my garage, I wanted plenty of time to do the install right…and they delivered! Literally. Thanks again and will look forward to the next order.



by:

Installed this today on my 2023 Ford F150 Lariat 4x4 with the tow package. The kit arrived within 2 days of ordering. The box was slightly open but the springs appeared undamaged. I elected to do the install myself and opted to get a 4 ton floor jack to replace my very old 3 ton. I’m very glad I did. After blocking the front tires and setting the parking brake, I loosened the wheels and raised the rear at the differential using a small 2x4 block to span the contact points. I took the wheels off and originally set my jack stands in front of the leaf spring on the frame. Lowering the truck onto the stands was not effective. There wasn’t enough travel to provide relief to the springs. I ended up setting my jack stands on some 1x16 scrap pieces and put them under the spring attachment point. This gave me just enough room on my floor jack to unburden the springs. Once I got over this small hurdle the install went smoothly. This took about an hour to very carefully construct as I didn’t want to drop my brand new truck on the ground. Brand new 5 ton jack stands would have eased my mind considerably. My install includes a spacer for the bump stop to offset it towards the centerline of the vehicle. The instructions weren’t intuitive and it took a few minutes to figure out the bolts. You need to insert the provided bolt into the spacer and attach the spacer to the frame with the original bump stop bolt. It’s the only one you can get a socket on in the depression. The bump stop then attaches to the provided bolt you inserted into the spacer using the provided nut. You will need a deep well 15mm socket for this attachment. Fortunately I had one. I set the spring using the 25% white spacer, reinstalled the wheels and set the truck back on the deck. The truck now sits 3/4” higher in the rear. I drove around and noticed that I was sitting a little higher as the site picture changed a bit. The truck didn’t seem to ride differently empty. If anything it seemed a little more cushioned though no less responsive. I towed my 9000lb travel trailer previously with a Ram 2500 6.7l diesel that had Sumo springs and a WD hitch. I got tired of the cost and maintenance and selected this Ford because it could haul the trailer. I chose the RAS over the Sumo springs because of how much squat I observed when I hooked up the trailer initially. I will update after I tow the trailer. My only concern at the moment is that the bump stop spacer isn’t going to provide enough clearance from the bracket.



by:

Installation was pretty easy. I am not a mechanic and it was straight forward. I would say that the pictures included in the installation instructions are not detailed and don't show a good close up. Including a video QR code would be way better.
Otherwise, the vehicle sits a bit higher and the back end seems more solid.



by:

I was a little concerned when they arrived as there was no instillation directions in the supplied literature. There was Ford, Dodge etc but nothing related to a 2023 Silverado 1500. I forged ahead using the universal instructions that were supplied. All turned out well. The instillation went much easier that expected. This is the second time in a month that I have ordered from etrailer.com. EXCELLENT fast service with lots of follow up on tracking etc. THAKS to all etrailer employees.



by:

This is my second F150 with an RAS installed. With RAS, my 2023 F150 2.7 Supercrew (with HD payload package, rated to tow 10,100#) tows my 6000# Airstream completely level with no squat and no issue when paired with a WD hitch. And yes, I've done the same tow without RAS and would prefer not to do it again. Absolutely an improvement over stock with minimal impact to daily driving. It does raise the rear about 1-2" but nothing the average person notices and I forget about it all the time. I'd like a leveling kit to help raise the front/reduce the rake a bit but then it wouldn't tow level anymore so that's the compromise. The RAS does exactly what it claims to do, at a fair price, and maintenance free (no airing up or down etc.) The only improvement that would be better would be trading up to a 2500 or 3500 but that's not the daily driver experience I want for the 80% of the time I'm not towing. I did buy again when I traded in my 2017 and would buy yet again if I got another half-ton.



by:

Received the package very quickly.
Installation
is easy for the DIYer.
Have already used the Road Active Suspension on my F150. Stabilized the body roll of the truck while towing My travel trailer. Coupled with weight distribution and sway control system the conventional tow travel trailer was as stable as a 5th wheel tow. Haven’t had a chance to tow yet with my F250 but expect the same results. Like others have said it does not change the ride of the empty F250.



by:

Product performs as it claimed. These are an excellent product.



by:

Purchased for a 2018 F150 to assist with towing a 6000lb RV travel trailer. The heavy duty model is too heavy duty. With the pre-loading as light as possible, the unloaded ride is stiff. Would recommend the standard model. With the travel trailer (using an Equalizer brand weight distribution hitch), the ride and stability was much improved over just the factory leaf springs. The rear of the truck was raised over an inch. Installation was straight forward. A little bit of guessing as to the pre-tensioning and if they are matched left and right. Would love it if the design could be changed such that it was easy to "snap on" when needed and "snap off" when unloaded. Maybe some sort of lever system would make this possible. Overall, they did what they are designed to do - assist the truck in being more stable when under load and less squat. I ended up trading the Ford for a Toyota which has coil springs so I passed on the RAS to the new owner of the Ford.



by:

I bought these after a 1000+ mile trip towing my trailer (~8000# loaded) with my 2013 F-150 (HD Payload & Max Towing Package). Installation was super easy. I did not need to take the tires off. There was plenty of room to get behind the tires and place and adjust the springs. Once installed they definitely give the truck a rake. I didn't measure pre-installation because I didn't expect the lift to be so great. I used the black disc to adjust the springs.
It's not too extreme but you can definitely see a difference compared to stock.
As you can see in the pictures, with the springs the drop with a trailer attached is greatly reduced and the truck sits level. Towing was great. I used a WDH before and being able to with springs only and a sway bar is pretty nice. Drop with trailer attached is only about 2.5 inches (see pics)



by:


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See what our Experts say about this RAS Vehicle Suspension

  • Best Rear Suspension Enhancement For 2023 Ford Transit T350HD SRW
    Hello Alan, thanks for reaching out. Sadly, the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3623-HD will not fit the Transit 350HD models. If you need to beef up the rear suspension, a better option would be the SuperSprings Custom Suspension Stabilizer and Sway Control Kit # SSA43. This will work with the SRW 350HD models. it mounts above the factory leaf springs to help reduce sagging and improve stability. The video I linked will show you the # SSA43 kit in more detail.
    view full answer...
  • Best Suspension Enhancement Recommendation to Improve Ride Quality of 2024 Ford Transit T250
    Hey Frank, we have what you are looking for to improve the ride quality of our 2024 Ford Transit T250 with the Roadactive kit part # RAS3623-HD, but the SumoSprings kit would not be what you are looking for. It might help a little bit but not enough to make it worth the investment. The Roadactive kits are only option that improve ride quality loaded and unloaded as well as improve handling as well. How would you describe the ride quality currently?
    view full answer...
  • Recommended RoadActive Suspension For 2019 Ford Transit T350
    I would be happy to help! The 2000lb rating of the RoadActive Suspension # RAS3623-GT or 3000lb rating of the Heavy Duty Version # RAS3623-HD refers to the amount of support that each kit will add to your rear suspension. This is not counting the weight of your vehicle, but just weight added like tongue weight of a trailer or weight from heavy cargo. These kits are unique in the sense that they do not stiffen up your suspension and give you a harsh ride like other styles of suspension...
    view full answer...

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Info for this part was:

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

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