Fabtech Radius Arm System

2008–2016 Ford F250/F350 4WD

Part #: K2128M

Overview

The Fabtech 8" Radius Arm System is a comprehensive suspension upgrade designed specifically for 4WD Ford F250 and F350 models from 2008 to 2016. Engineered to deliver exceptional off-road capability, improved ride height, and enhanced stability, this system is ideal for enthusiasts seeking to elevate their truck's performance and appearance. Whether you're tackling rugged trails or upgrading for a commanding presence on the road, this kit provides the durability and functionality you need.

Featuring a full tubular construction with dimple die side plates, the Fabtech Radius Arm System offers increased strength and longevity. The adjustable alignment cam at the axle allows for precise caster adjustments, ensuring optimal steering and handling. The front lift is achieved through 8-inch replacement coil springs, providing a significant lift height while maintaining ride quality. Completing the system are essential components such as a trac bar relocation bracket, Pitman arm, sway bar drops, U-bolt kit, and replacement rear leaf springs, making this a complete solution for your suspension needs.

Key Features

The Fabtech Radius Arm System incorporates several innovative features designed to enhance your vehicle's performance and durability:

• Full tubular radius arms with dimple die side plates for increased strength and resistance to bending or cracking under demanding conditions.
• Adjustable alignment cam at the axle, allowing for precise caster adjustments to optimize steering geometry and tire wear.
• 8-inch replacement coil springs that provide a substantial lift, improving ground clearance and off-road capability without sacrificing ride comfort.
• Heavy-duty trac bar relocation bracket to maintain proper axle positioning and prevent wandering or misalignment during off-road use.
• Reinforced Pitman arm and sway bar drops designed to accommodate the increased lift and maintain factory-like handling characteristics.
• U-bolt kit and replacement rear leaf springs to support the lifted suspension and ensure a balanced, stable ride both on and off-road.
• Made in the United States, ensuring high-quality craftsmanship and reliable performance.

Construction & Design

The Fabtech Radius Arm System is built with durability and precision in mind. The tubular radius arms are crafted from high-strength steel, featuring dimple die side plates that add rigidity while reducing weight. The system's components are designed for a bolt-on installation, utilizing factory mounting points and hardware for a straightforward upgrade process. The 8-inch coil springs are engineered to provide a balanced lift, maintaining ride quality while increasing ground clearance. All brackets and relocation components are CNC-machined for exact fitment, ensuring seamless integration with your vehicle's existing suspension geometry.

Performance & Sound

With this suspension upgrade, you'll experience improved off-road capability, better wheel articulation, and a commanding stance. The increased ride height allows for larger tires, enhancing traction and obstacle clearance. The system also improves handling stability during spirited driving and off-road adventures. While primarily focused on performance and durability, the system maintains a factory-like ride quality, ensuring comfort on daily drives. No significant noise or harshness is introduced, thanks to the high-quality materials and precise engineering.

Installation & Fitment

The Fabtech 8" Radius Arm System is designed as a bolt-on upgrade, making installation straightforward for those with basic mechanical skills. The kit utilizes existing factory mounting points, and no cutting or drilling is required in most cases. However, professional alignment is recommended after installation to ensure optimal handling and tire wear. The system is compatible with 2008–2016 Ford F250 and F350 4WD models, providing a reliable, long-lasting suspension solution for lifted trucks.

• Complete bolt-on installation with no cutting or welding required in most applications.
• Includes all necessary hardware, brackets, and springs for a full upgrade.
• Professional alignment recommended for best results.

What's Included

• Full set of tubular radius arms with dimple die side plates
• 8-inch replacement coil springs
• Trac bar relocation bracket
• Pitman arm
• Sway bar drops
• U-bolt kit
• Replacement rear leaf springs
• All necessary mounting hardware and instructions

Ideal For

• Off-road enthusiasts seeking increased ground clearance and wheel travel
• Truck owners wanting a reliable, high-quality suspension lift
• Those looking to improve vehicle stance and appearance
• Drivers who require enhanced stability and handling during demanding conditions