Dodge Ram 3500 2003 - 2025 HD Kit
Dodge Ram 3500 2003 - 2025 HD Kit
Dodge Ram 3500 2003 - 2025 HD Kit
Dodge Ram 3500 2003 - 2025 HD Kit
Dodge Ram 3500 2003 - 2025 HD Kit

Dodge Ram 3500 2003 - 2025 HD Kit

SKU: 3613-THD

Regular price$589.00
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Shipping calculated at checkout.

Fitment

Checking fitment for your active vehicle...

Factory Overload Spring
  • In stock, ready to ship
  • Backordered, shipping soon
  • 1-3 Day Free Ground Shipping 1-3 Day Free Ground Shipping i
  • 5 year warranty 5 year warranty i
  • Discount Applied. Other coupon codes not valid during sale. Discount Applied. Other coupon codes not valid during sale.

Kit includes  RAS Heavy Duty Spring for each rear leaf spring. RoadActive Suspension kits are designed to strengthen the rear leaf springs for towing or hauling without negatively affecting unloaded ride quality. This kit will reduce rear bounce and squat when loaded while significantly improving stability, handling and performance at all times. Some Dodge 2500/3500 may require disassembly of rear shackle -- please see fitting instructions inside box. Estimated install time is 1-3 hours. 

*Contact us if truck has factory top overload spring

RoadActive Suspension provides a 30 day money back guarantee, from date of purchase. However should the kit be returned, it must be re packed in the original packaging with all components included. On orders with free shipping (where shipping was paid for by RoadActive Suspension), refunds will reflect the invoiced amount, minus that shipping cost billed to us by our shipping provider. In addition, the customer will be responsible for the return freight charges.

It works with your suspension — not against it.

Each kit is tailored to your specific vehicle

RoadActive Suspension is uniquely assembled for your model and typically ships within 1-2 business days! RoadActive Suspension is the only suspension upgrade on the market that adds strength to your rear suspension, provides same as or better than stock unloaded ride quality and doesn’t require readjustments or maintenance.

Each RAS kit comes fully assembled out of the box and ready for installation. Follow your application guide that is in the box and you will be ready to test your RoadActive Suspension after an installation as simple as 45 minutes! If you are not satisfied with your RoadActive suspension we offer a money back guarantee.

Reduce Rear Squat & Bounce

Improve Stability

Improve Roadhandling & Stability

Make RVing Safer

Reduce Axle Wrap

No Readjustments or Maintenance

We already know what you're going to ask.

No, installing RoadActive Suspension (or any other rear suspension helper) does not automatically void the factory warranty. The Magnuson Moss Act states that it is illegal for a vehicle manufactuer or dealership to void a warranty just because a part has been installed. The manufacturer or dealership may only void the warranty if they are able to prove the aftermarket part caused or contributed damage to the vehicle. Even then, warranty to the impacted component(s) is the only portion of the warranty that may be voided. In this case, all other parts of the vehicle remain under warranty.

RAS uses a variable-rate tension coil spring that attaches directly to your rear leaf springs. It works like a muscle, progressively engaging as load or force is applied. This keeps the leaf springs in an upright bowed position to prevent sag, improve stability, and enhance bounce isolation.

Most applications see a 2–3" reduction in rear squat. The exact amount will depend on multiple factors such as vehicle size, load size, load placement, leaf spring condition, and the tension setting of the RAS.

Expect same-as or better-than-stock unloaded ride with less bounce and more control.

Yes — in as little as 45–60 minutes with jack stands and hand tools. No drilling, no air lines, no maintenance.

Airbags add complexity, cost, and ongoing maintenance. Other helper springs only address sag and can compromise ride comfort.RAS is 3-in-1:it controls squat, reduces sway, and improves traction — all with zero maintenance.

Customer Reviews

Overall rating: 4.7 / 5 from 11 reviews.

Customer photo review of Dodge Ram 3500 2003 - 2025 HD Kit

No more sagging and the ride is a game changer. I’ve done airbags in the past, never again!!!!

Dodge Ram 3500 2003 - 2025 HD Kit

Customer photo review of Dodge Ram 3500 2003 - 2023 HD Kit

The RAS suspension was a great addition. It eliminated porpoising while towing my camper. I did not have a weight mismatch issue before, but when the roads were rough, it would cause porpoising anyway. I noticed a big improvement in daily driving, too. I drove the truck on National Forest roads and when the road got rough, I could tell a big difference compared to the last time I drove that type of road.

Dodge Ram 3500 2003 - 2023 HD Kit

Customer photo review of Dodge Ram 3500 2003 - 2023 HD Kit

I installed the Road Active Suspension on my 2022 Ram 3500, and I couldn’t be more impressed. Installation was incredibly easy—no special tools or complicated setup required. I had it bolted on and ready to go in under an hour. What really stands out is how it maintains the truck’s normal ride feel. Even with heavy loads or towing, the truck stays level and controlled without sacrificing comfort. Best of all, there’s no hassle with airbags—no lines to run, compressors to install, or constant pressure checks. It’s a clean, simple, and effective solution that just works. If you’re looking for a suspension upgrade that improves stability and load handling without changing the everyday ride, this is definitely the way to go.

Dodge Ram 3500 2003 - 2023 HD Kit

Customer photo review of Dodge Ram 3500 2003 - 2023 HD Kit

If you have a dodge ram 3500 dually it won’t work, you’ll need a rear anti sway bar. As long as you don’t have an overload leaf spring you’ll be fine.(only on the dodge ram)

Dodge Ram 3500 2003 - 2023 HD Kit

Customer photo review of Dodge Ram 3500 2003 - 2023 HD Kit

My 2018 Ram 3500 srw rides alot smoother, handles better when unloaded and also when towing our fifth wheel. I don't know the part #.

Dodge Ram 3500 2003 - 2023 HD Kit

Put them on my 2011 dodge 3500 to help pull my 44’ camper and after the first trip I will be removing the air bags off my other 2 truck and purchasing a set of these for them as well cannot express how impressed I am with them over airbags

Dodge Ram 3500 2003 - 2025 HD Kit

2015 Dodge Ram 3500 single wheel. Easy to install. My first trip tamed down the bucking with my fith whee L. Holds up the load better.

Dodge Ram 3500 2003 - 2025 HD Kit

I carry a pretty heavy load. I installed the RAS kit first. It helped on droop and bounce but really helped on sway from side to side while cornering. No effect on normal unloaded driving and still as smooth as stock. I was impressed. I later added air bags. The combination of the two really makes an improvement.

Dodge Ram 3500 2003 - 2025 HD Kit

As for the unit I used it on a huge load and it was hard to tell if it helps cause it was so heavy. I’m confident it will definitely help on normal to heavy loads. The customer service I experienced was top notch. Highly recommended. Thanks!

Dodge Ram 3500 2003 - 2023 HD Kit

Put these on our 2018 Ram 3500. The ride is night and day. Used white disc and seems to be enough.

Dodge Ram 3500 2003 - 2023 HD Kit