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

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

• (RAS) RoadActive Suspension HD Rear Leaf Spring Upgrade – U.S. Company, Original Product built by the original creators of RoadActive Suspension system, this rear leaf spring upgrade comes from a North Carolina based company with a track record of durability and performance since 1998. Engineered and assembled with a focus on quality and reliability. Look for the RAS trademark to ensure you're getting the authentic, original product.
• Reduces Squat & Bounce – Strengthens rear leaf springs by up to 50%, providing improved load support and control when towing or hauling—without compromising ride height.
• Smooth Ride, Loaded or Empty – Maintains superior ride quality and vehicle stability in all conditions—unlike airbags or stiff jounce-style alternatives that affect everyday comfort.
• No Maintenance. No Adjustments. No Air Lines. – Installs in as little as 45 minutes and begins working immediately with zero upkeep—ideal for drivers who want performance without the hassle.
• Proven, Tested, and Built to Last – Designed and tested for heavy-duty use on the road and off. Trusted by hundreds of thousands for its unmatched reliability, safety, and long-term durability.
• 3-in-1 Suspension Upgrade – Functions as a helper spring, sway bar, and traction bar in a single, cost-effective solution