Fabtech 6" Radius Arm System

2017–2021 Ford F250/F350 4WD Diesel

Part #: K2231DL

Overview

The Fabtech 6" Radius Arm System is a comprehensive suspension upgrade designed specifically for Ford F250 and F350 trucks equipped with 4WD diesel engines from 2017 to 2021. Engineered to enhance off-road capability, improve ride quality, and support larger tires, this system provides a significant lift while maintaining factory-like handling and durability. Whether you're a serious off-roader, a towing enthusiast, or someone seeking a commanding stance, this radius arm system delivers reliable performance and improved ground clearance.

Built with the enthusiast in mind, this kit allows you to tackle rugged terrains with confidence while ensuring your vehicle remains stable and responsive. The system's design emphasizes strength, precision, and ease of installation, making it an excellent choice for those looking to upgrade their truck's suspension without sacrificing ride comfort or drivability.

Key Features

The Fabtech Radius Arm System incorporates several advanced features that set it apart from standard suspension components:

• Constructed with full tubular steel for maximum strength and durability, ensuring long-lasting performance under demanding conditions.
• Patented radius arms feature dimple die side plates, which reinforce the structure and resist flexing or bending during off-road use.
• An adjustable alignment cam at the axle allows for precise caster adjustment, helping to optimize steering geometry and tire wear.
• Includes a Trac Bar relocation bracket to maintain proper axle positioning and improve handling characteristics.
• Comprehensive kit with Pitman Arm, sway bar drops, and a rear block & U-bolt kit to complete the suspension upgrade.
• Designed and manufactured in the United States, ensuring high-quality craftsmanship and reliable performance.
• Compatible with diesel models, providing a tailored fit and optimal performance for your specific truck configuration.
• Supports larger tires and increased ground clearance, making it ideal for off-road adventures or heavy-duty applications.
• Engineered to retain factory ride quality while offering enhanced off-road capability and stance.

Construction & Design

The Fabtech Radius Arm System is built with precision and durability in mind. The main components, including the radius arms, are fabricated from full tubular steel, which provides superior strength compared to traditional stamped or welded parts. The dimple die side plates further reinforce the arms, preventing flex and ensuring consistent alignment under load. The adjustable cam at the axle allows for fine-tuning caster angles, which is critical for maintaining proper steering response and tire wear over time.

The inclusion of a Trac Bar relocation bracket ensures that the axle remains centered during articulation, improving handling and stability. The Pitman Arm and sway bar drops are designed to work seamlessly with the factory steering and suspension geometry, preserving factory handling characteristics while accommodating the lift height. All components are designed for a bolt-on installation, with high-quality hardware and precise fitment to reduce installation time and ensure a secure, long-lasting upgrade.

Performance & Sound

This suspension system is engineered to provide a noticeable improvement in off-road capability and ride quality. The increased ground clearance allows for larger tires and better obstacle clearance, while the reinforced radius arms and related components ensure durability during demanding off-road conditions. The system maintains factory-like handling on paved roads, with no excessive noise or harshness introduced by the upgrade. The design promotes a stable, confident driving experience both on and off the pavement.

Installation & Fitment

The Fabtech 6" Radius Arm System is a bolt-on upgrade that is designed for straightforward installation with standard tools. No cutting, drilling, or welding is required, making it accessible for experienced DIY enthusiasts and professional installers alike. Proper alignment is recommended after installation to ensure optimal handling and tire wear. The kit is specifically tailored for 2017–2021 Ford F250 and F350 4WD diesel models, ensuring a perfect fit and seamless integration with your vehicle's existing suspension components.

• Designed for easy bolt-on installation with factory mounting points.
• No cutting, drilling, or welding required.
• Includes all necessary hardware and detailed instructions for a hassle-free upgrade.

What's Included

• Full set of tubular radius arms with dimple die side plates
• Trac Bar relocation bracket
• Pitman Arm
• Sway bar drop brackets
• Rear block and U-bolt kit
• All necessary mounting hardware and instructions

Ideal For

• Off-road enthusiasts seeking increased ground clearance and durability
• Heavy-duty towing and hauling applications
• Owners looking to upgrade their truck's suspension for a commanding stance
• Drivers wanting to maintain factory ride quality with enhanced off-road capability

Emissions Note

This suspension system is designed for off-road use and does not affect emissions compliance. It is intended for vehicles used in off-road environments or on private property. Always check local regulations before installation.