Fabtech 4" Radius Arm System

2008–2016 Ford F250/F350 4WD

Part #: K2211

Overview

The Fabtech 4" Radius Arm System is a comprehensive suspension upgrade designed specifically for Ford F250 and F350 trucks from 2008 to 2016 with 4WD. Engineered to enhance off-road capability, improve ride quality, and provide a commanding stance, this system is ideal for enthusiasts seeking reliable performance and durability. Whether you're tackling rugged trails or upgrading for better on-road handling, this kit offers a balanced combination of strength and versatility.

Built with quality and precision, the Fabtech Radius Arm System replaces the factory components with a full tubular structure reinforced by dimple die side plates, ensuring increased strength and longevity. The system includes adjustable alignment cams at the axle, allowing for precise caster adjustments to optimize steering and handling characteristics. Complete with replacement coil springs, performance shocks, sway bar drops, and a rear block & U-bolt kit, this setup provides a significant lift while maintaining factory ride quality.

Key Features

The Fabtech Radius Arm System incorporates several advanced features designed to deliver superior performance and durability:

• Full tubular radius arms with dimple die side plates for enhanced strength and resistance to flexing under load.
• Adjustable alignment cams at the axle to facilitate precise caster alignment, improving steering response and tire wear.
• High-quality replacement coil springs engineered to support the increased ride height and load capacity.
• Performance front and rear shocks designed to handle off-road terrain while providing a smooth on-road ride.
• Sway bar drops included to restore proper sway bar geometry after lifting, ensuring stability and handling.
• A rear block and U-bolt kit for proper axle positioning and ride height correction.
• No welding required during installation, with an estimated setup time of 6-7 hours and only 6 holes to drill, making it a manageable upgrade for DIY enthusiasts and professional installers alike.
• Manufactured by Fabtech, a trusted name in off-road suspension systems, ensuring quality and reliability.

Construction & Design

The Fabtech Radius Arm System features a robust tubular design crafted from high-strength steel, providing exceptional durability under demanding off-road conditions. The use of dimple die side plates adds extra reinforcement to the radius arms, preventing flex and ensuring long-lasting performance. The system's components are precisely engineered to fit seamlessly with the factory chassis and suspension geometry, maintaining proper alignment and handling characteristics.

The included coil springs are designed to support the lifted stance while preserving ride comfort. The performance shocks are engineered for off-road abuse yet tuned for a smooth on-road experience. The sway bar drops restore factory-like handling and stability, even with the increased ride height. Overall, the design emphasizes strength, ease of installation, and maintaining factory-like reliability.

Performance & Sound

This suspension upgrade significantly improves off-road capability by increasing ground clearance and wheel travel, allowing your truck to conquer rough terrain with confidence. The adjustable caster cams enable fine-tuning of alignment, which enhances steering response and reduces tire wear. The performance shocks provide better damping, resulting in improved ride quality and stability both on and off the pavement. While this system is primarily designed for durability and function, it also offers a commanding stance that enhances the truck's aggressive appearance.

Installation & Fitment

The Fabtech 4" Radius Arm System is a bolt-on upgrade that requires no welding, making it accessible for experienced DIYers and professional installers. The installation process involves drilling six holes to accommodate the new components, with an estimated time of 6-7 hours. No cutting, grinding, or extensive modifications are necessary, and the system is designed to fit seamlessly with the factory chassis and suspension parts.

• Includes all necessary hardware, brackets, and components for a complete installation.
• Requires basic hand tools and standard mechanical skills.
• Proper alignment is recommended after installation to ensure optimal handling and tire wear.

What's Included

• Full set of tubular radius arms with dimple die reinforcement
• Adjustable caster alignment cams
• Replacement coil springs
• Performance front shocks
• Performance rear shocks
• 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
• Truck owners wanting a reliable lift for improved appearance and performance
• Drivers who frequently tackle rugged terrain or heavy loads
• Those looking to restore factory handling after lifting