Original (RAS®) RoadActive Suspension 3611-YHD | Fits Ford F150 4WD 2009-2025
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Original (RAS®) RoadActive Suspension 3611-YHD | Fits Ford F150 4WD 2009-2025

4.6/5
Product ID: 384928819
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Details

  • Brand
    RAS
  • Auto Part Position
    Rear
  • Included Components
    Leaf Spring
  • Maximum Lifting Height
    3 Inches
  • Manufacturer
    RoadActive
💪50% stronger rear leaf springs
⏱️Under 1-hour easy install
🇺🇸100% Made in USA quality

Description

🚛 Elevate your F150’s performance with the ultimate USA-made suspension upgrade!

  • HASSLE FREE SETUP - Installs in less than an hour with zero maintenance or adjustments—ditch complicated air systems forever.
  • SMOOTH RIDE ALWAYS - Enjoy superior ride quality and stability whether your F150 is loaded or empty—no stiff suspension compromises.
  • BOOSTED TOWING POWER - Reinforces rear leaf springs by up to 50% to eliminate squat and reduce bounce under heavy loads.
  • UNRIVALED DURABILITY - RAS mark guarantees premium, rigorously tested USA craftsmanship since 1998.
  • BUILT FOR THE LONG HAUL - Engineered for heavy-duty towing, hauling, and daily driving with proven long-lasting reliability.

The Original RAS RoadActive Suspension 3611-YHD is a heavy-duty rear leaf spring upgrade designed exclusively for Ford F150 4WD models from 2009 to 2025. Made in the USA with premium materials and tested since 1998, it reinforces rear springs by up to 50%, eliminating squat and bounce for superior towing and hauling. It installs quickly in under an hour with no maintenance required, delivering unmatched ride quality and durability for everyday and heavy-duty use.

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Specifications

ManufacturerRoadActive Suspension
BrandRAS
Item Weight33.5 pounds
Package Dimensions31.2 x 10 x 5.4 inches
Item model number3611-YHD
Manufacturer Part Number3611-YHD
PositionRear

Have a Question? See What Others Asked

How is RAS different from other suspension helpers such as air bags?
How much does RAS increase payload capacity?
Will RAS fit my lifted truck?
Will RAS help reduce my rear squat?

Reviews

4.6

All from verified purchases

L**R

A major difference on F150.

2019 Whippled F150 5.0L. Bilstein 5100 shocks all 4 wheels. Truck sat level pre Roadmaster. I purchased the HD version. Installation was a breeze. Took about 2 hours taking my time. Wow! My truck rides so much nicer and gained 1.5 inches of lift in the rear set with black disc. I like the little rake it brought back to the truck. With this system I can barely tell my 26 foot, 5000lb travel trailer is on the back. No sway, bumps are one and done, no bouncing. It made the ride and handling about 50% better all the way around. Best of all no hop and zero axle wrap when I launch it. The truck hooks right up! Imo these work better than traction bars without sacrificing ground clearance. For 550 bucks this took care of all my issues I wanted to solve. Only con was my hands got dirty. Get long jack stands if you don't have them. Oh USA made and 3 year warranty too! Just get them and you'll be very happy.

D**L

2021 F150 King Ranch PowerBoost - towing with comfort and stability.

My 2021 King Ranch PowerBoost has a max payload of 1316 lbs (very low for a new truck) and I needed more assurance towing our 2022 Rockwood Minilite 2509S.Rockwood Minites are notorious for heavy tongue weight (850lbs RAW for a 6360 lbs trailer). I am running an E2 WDH 10,000lb and even though the hitch height is perfectly set (before adjusting the bars and washer), there is quite a bit of read sag, almost to the bottom.Simply put, I needed more assurance for the rear axle weight and support than the 2 leaf springs FORD has decided to move to with their ‘Max Trailer Tow Package’ and #7350 GVWR package.I swapped out the FX4 front and rear shocks for FOX 2.0 Ford Tuned from TC Customs, upgraded the tires (275 60R20) to an E Load tire (295 60R20). Now with my tire PSI set at 60 cold (max is 80), I needed more safety. Enter the RAS.I talked to RAS support and with the YHD they said max space can be set to 2.5mm, or a nickel and a dime thickness, which I did.Install was very easy, the added bump stop relocaters are helpful as well since the 2021 has the auto level headlight sensors on the rear drivers side axle that the RAS would have had issues with for the bump stop.Now loading up my trailer, tongue weight and WDH fully set, my front and rear wheel wells are at 40 1/2 (even) and the front axle has gained 40lbs over unloaded weight. The rear is still holding 600-700lbs but with the RAS I am towing with confidence and control.I am also added Timbren SES in place of the Stock Bump Stop for added towing comfort and control.If you are driving a 2021 F150, I highly recommend you install the RAS even if your towing is light.Loaded and unloaded the driving, comfort and control is vastly improved.Highly recommend 10/10.

E**K

improvement

Installed on my 17 f150. It's definitely stiffer but not as bad as the helper springs I've tried, it feels sportier. It took out a lot of the squat and feels much more stabile when trailering. It doesn't have the shimmy that it used to have. Not towing it seems to help with the traction and the back end hardly squats under acceleration.

K**D

Works better than I thought it would.

This was a piece of cake to install with a little patience and a couple of hours. We hauled a 25FB Airstream with a 2024 F150 Lariat and didn't have any issues on a 6 hour drive. No dog wag or weird sway at any point. It felt very secure and solid and it kept the truck looking level.I would definitely recommend!

D**E

Seems to help

They do seem to help with Bunnyhop, on washboard Roads. They do help a little with side to side sway with my 2000 pound camper. If you have airbags, you may have to do some modification of The mounts which hold the airbags. That can be a lot of fun. Overall seems like a good product, and it’s made fairly beefy, easy to adjust.

T**N

Easy install,

Installed the RAS on my 23 f150 tremor, absolutely improved the ride on the rough country roads that I travel daily. No more rear end hop,much more stable. No more excessive squat with my 8000lb trailer hooked to the truck. Could not be happier with the added capability, and improved ride this system gave my truck. I'm 67 and it took me about a hour and a half to install.,no problem. I highly recommend this system if you tow any thing, or travel rough roads frequently in a f150 Ford!

D**T

Lives up to all the hype...

Have seen numerous references to the mysterious "RAS" on several F150 forums- I tow a 6000# travel trailer, the truck does an excellent job pulling it, but I kept experiencing "porpoising" of the trailer following subtle highway undulations. Spent about 45 minutes installing, and other than raising the rear bumper about an inch and a half, the RAS did not change the empy ride of the truck. Just completed a 750 mile road trip pulling the trailer and I have to say the truck has never felt so planted. Easily self-installed (I'm over 70 yrs old) in under an hour, and in my books, worth every dime. If you own one of the modern "half ton" trucks and tow a trailer occasionally, you need this addition.

R**K

So far so good!

Install my 2023, 150 lariat. Increased Hitch hight the back of the truck, two inches. On minimal setting., loose. For towing my boat. And help with normal everyday bumps. Streets are terrible in Denver. Seems to handle the bumps and potholes better. And curb jumps. Ride feels smoother. Hoping it takes away the highway expansion joint jumps, and the warnout concrete vibration. I tried the Rancho nine stage shocks. Took them off and threw him in the trash. Put the old shocks back on. This seems to be the best effect so far for normal driving. Handles well. Highway rough cement and expansion joints. Hardly noticeable.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Original Ras Roadactive Suspension 3611 Yhd Fits Ford F150 4wd | Desertcart French Guiana