Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit
Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit
Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit
Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit
Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit

Chevrolet 2500 Silverado 2011 – 2026 | Mega-Duty Kit

SKU: 3611-CMD

Regular price$649.00
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Fitment

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Overload Spring
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  • 5 year warranty 5 year warranty i

Get the best of both worlds with RoadActive Suspension® Mega-Duty — our strongest suspension upgrade engineered for heavy payloads, serious towing, and demanding truck applications.

Mega-Duty strengthens your factory leaf springs by up to 50% while improving unloaded ride quality, handling, and overall control — without the hassle or maintenance of airbags.

Designed for 3/4-ton and 1-ton trucks that tow and haul regularly, RAS® Mega-Duty helps reduce:

• Up to 2" of squat
• Excessive bounce & body roll
• Sway & axle wrap

Independently tested at the Transportation Research Center (TRC):

• 23% reduction in road transmissibility
• 43% improvement in pitch stability
• Approximately 30% stronger spring rate than HD

This fully mechanical 3-in-1 system combines the benefits of a helper spring, sway bar, and traction bar into one simple bolt-on upgrade with zero maintenance required.

If you're squatting with your F-250 — Mega-Duty is the answer.

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: 4.8 / 5 from 10 reviews.

2026 chevy 2500 crew cab what a difference went with timbren supports first was not impressed added the RAS Nite and day difference

Easy installation and the first drive I took I immediately noticed my truck rode smoother and the body sway was gone on curves. My RAS is set at 40 % and my truck is 4.5” higher in the rear than it was previously. I love it and my truck is a 2025 GMC 2500 AT4 4x4!

I put this in to help tow my 36’ travel trailer camper. I have a 3/4 ton truck that squat a bit with this not in and I could feel it in the steering when driving with the camper. Not only did this system help with my camper pulling experience but also with my daily driving! I have it at 50% increase and I notice everything from smoother driving to better steering control! I love this and am so glad I put it on!

Installed on 2016 Chevy 2500HD. Pleasantly surprised. Truck is much more stable. I can feel the difference unloaded. I won't be able to try loaded for a few months. Bumps are less jarring and it feels more planted on corners. I only wish I would have done this sooner. Installation is simple but a challenge for a 72 year old. With the help of a friend we got it done in 45 minutes.

It was really straight forward and easy to install on my 2500HD GMC. Was extremely hot outside and took me a little over an hour by myself. Hooked it up to my 10,000 lb grill, it rode and pulled great with minimal squat. Recommend for everyone who pulls trailers with their truck.

2016 Chevy 2500. Heavy duty RAS kit. Installed easy, plenty of videos on YouTube as well but really could not have been any easier to install. I did not experience a noticeable change in the truck hauling my camper. I still have issues with the front end of the truck feeling like it’s floating which I hoped this kit would help with.

Very pleased with the system

I have a food trailer with dual 11k generators sitting on the tongue. I could not pull the trailer over 60mph and still at that speed not very safe. After install I can run down the freeway at 70mph and barely notice the trailer is back there!!!!

Love this kit. Definently dont have to crank em up as tight as they recommend unless you are loaded heavy heavy