Fabtech Radius Arm Kit

2013–2018 Ram 3500 4WD

K3147

Overview:

The Fabtech Radius Arm Kit with Performance Shocks is engineered specifically for 2013 to 2018 Ram 3500 trucks, delivering a superior coil spring suspension upgrade that enhances ride quality and durability. Designed to replace the factory suspension components, this kit offers a smoother on-road experience while maintaining the heavy load capacity and rugged off-road capability Ram 3500 owners expect. Ideal for drivers who demand both comfort and performance, Fabtech’s innovative design addresses the common stiffness and harshness found in stock suspension setups.

Fabtech’s exclusive use of straight coil springs combined with patent-pending angled lower mounts provides a noticeable improvement in ride smoothness compared to the factory bowed springs. This system is tailored to handle large tires up to 38 inches with minor trimming, making it perfect for enthusiasts looking to upgrade their truck’s stance and off-road readiness without sacrificing daily drivability.

Key Features:

This Radius Arm Kit stands out with several advanced features that enhance both performance and reliability:

• 7-inch suspension lift designed for Ram 3500 4WD models from 2013 to 2018
• Front coil springs with a straight spring design for a lower spring rate and smoother ride
• Patent-pending angled lower mounts that improve ride quality over stock suspension
• Includes high-performance shocks engineered to complement the coil springs
• Supports tire sizes up to 38x13.50R22 with minor trimming required
• Compatible with 17x9, 18x9, 20x10, and 22x10 wheels with 5-inch backspacing
• Maintains factory load carrying capacity for heavy-duty use
• Exclusive design not available in other Ram suspension systems
• Does not fit vehicles equipped with factory air suspension

Construction & Design:

Fabtech’s Radius Arm Kit is built with durability and precision engineering in mind. The coil springs feature a straight design that reduces spring rate stiffness, resulting in a more compliant ride without compromising load capacity. The patent-pending angled lower mounts are crafted to optimize suspension geometry and absorb road irregularities more effectively than factory components.

All components are manufactured from high-strength materials to withstand the rigors of heavy-duty hauling and off-road conditions. The performance shocks included in the kit are tuned specifically for the Ram 3500’s weight and suspension travel, ensuring consistent damping and control across varied terrains.

Installation & Fitment:

The Fabtech Radius Arm Kit is designed for direct fitment on 2013 to 2018 Ram 3500 4WD models, including Big Horn, Laramie, Laramie Limited (2014–2015), Laramie Longhorn, Limited (2016–2018), Lone Star (2013–2015, 2017), SLT, ST (2013), and Tradesman trims. Installation requires minor trimming to accommodate larger tires and wheels but does not necessitate major modifications.

This kit is not compatible with factory air suspension systems. Professional installation is recommended to ensure proper alignment and suspension performance.

What's Included:

• Front coil springs with straight spring design
• Patent-pending angled lower mounts
• Performance-tuned front shocks
• Radius arms and necessary mounting hardware
• Installation instructions

Ideal For:

This Radius Arm Kit is perfect for Ram 3500 owners seeking a suspension upgrade that balances on-road comfort with off-road capability. It is especially suited for those who run larger tires up to 38 inches and require a suspension system that can handle heavy loads without sacrificing ride quality. Whether you use your truck for towing, hauling, or weekend adventures, Fabtech’s kit delivers a refined driving experience and enhanced durability.

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.