Fabtech Radius Arm Kit

2013–2018 Ram 3500 4WD Diesel

K3144DL

Overview:

The Fabtech Radius Arm Kit with 2.25" Dual Linear Steering Stabilizer (DLSS) is engineered specifically for 2013 to 2018 Ram 3500 4WD diesel trucks. Designed to enhance suspension performance and ride quality, this kit replaces the factory radius arms with heavy-duty components that improve front-end stability and handling under demanding conditions. Ideal for Ram 3500 owners who require a smoother on-road ride without sacrificing load-carrying capacity or off-road capability, this kit delivers a balanced suspension upgrade that outperforms stock setups.

Fabtech’s innovative coil spring suspension system, paired with the radius arm kit, features a unique straight spring design and patent-pending angled lower mounts. This combination significantly reduces the harshness and stiffness commonly experienced with factory bowed springs, providing a more comfortable driving experience while maintaining the truck’s ability to handle heavy loads and rough terrain.

Key Features:

This radius arm kit offers a range of advanced features that enhance both performance and durability:

• 5-inch suspension lift designed for 2013–2018 Ram 3500 4WD diesel models
• Includes 2.25" Dual Linear Steering Stabilizer (DLSS) for improved steering control and reduced vibration
• Compatible with tire sizes up to 37" (various widths) on wheels ranging from 17" to 22" with minor trimming
• Utilizes Fabtech’s exclusive straight coil spring design for a smoother ride and lower spring rate
• Patent-pending angled lower mounts optimize spring alignment and suspension geometry
• Maintains factory load-carrying capacity despite lift and suspension modifications
• Heavy-duty construction engineered to withstand off-road abuse and heavy-duty use
• Designed to improve front suspension articulation and reduce harshness over rough surfaces
• Does not fit gas engine models or trucks equipped with factory air suspension

Construction & Design:

Fabtech’s Radius Arm Kit is built with high-strength steel components that are precision-engineered for durability and long-lasting performance. The radius arms are designed to maintain proper suspension geometry throughout the lift range, ensuring consistent handling and alignment. The included 2.25" Dual Linear Steering Stabilizer enhances steering feedback and reduces the effects of road shock and vibration, providing a more controlled driving experience.

The coil springs feature a straight design, a departure from the factory bowed springs, which naturally ride stiff. Fabtech’s straight springs have a lower spring rate, which smooths out the ride without compromising the truck’s ability to carry heavy loads. The patent-pending angled lower mounts further refine suspension movement and improve overall ride quality.

Installation & Fitment:

This radius arm kit is designed for direct bolt-on installation on 2013 to 2018 Ram 3500 4WD diesel trucks. Minor trimming of the fender or wheel well may be required when running larger tires up to 37" with specific wheel sizes and offsets as outlined in the fitment details. It is important to note that this kit is not compatible with gas engine variants or trucks equipped with factory air suspension systems.

Installation requires standard suspension tools and mechanical knowledge. For optimal results and safety, professional installation is recommended. Proper alignment after installation is essential to ensure correct handling and tire wear.

What's Included:

• Front radius arms engineered for 5-inch lift
• 2.25" Dual Linear Steering Stabilizer (DLSS)
• Hardware and mounting brackets necessary for installation
• Detailed installation instructions

Ideal For:

This Fabtech Radius Arm Kit is ideal for Ram 3500 owners who demand a suspension upgrade that balances on-road comfort with off-road capability. It is perfect for those who frequently haul heavy loads or tow, while also seeking improved ride quality and steering control. Enthusiasts looking to run larger tires up to 37" with compatible wheels will benefit from this kit’s design and fitment options.

Fabtech is an off-road suspension leader producing lift kits, shocks, and related components to increase ride height, clear larger tires, and improve capability. Their systems are engineered for specific trucks and SUVs, blending on-road drivability with the added travel and strength enthusiasts want for trails, desert runs, and overland builds.