Fabtech Radius Arm System

2017–2021 Ford F250/F350 4WD Gas

Part #: K2253M

Overview

The Fabtech 4" Radius Arm System with Coils & Stealth is a comprehensive suspension upgrade designed specifically for 2017–2021 Ford F250 and F350 4WD gas models. Engineered to enhance off-road capability, improve ride quality, and provide a more aggressive stance, this system is ideal for enthusiasts who demand durability and performance from their trucks. Whether you're tackling challenging trails or seeking a more commanding look on the street, this kit delivers reliable, high-quality components that support your vehicle's performance needs.

Featuring a patented radius arm design, this system replaces the factory components with a full tubular structure reinforced by dimple die side plates. This construction ensures increased strength and durability, allowing your truck to handle rough terrain and heavy loads with confidence. The inclusion of adjustable alignment cams at the axle provides precise caster adjustment, helping to optimize steering geometry and tire wear for a smoother, more controlled driving experience.

Key Features

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

• Full tubular radius arms with dimple die side plates for enhanced strength and durability, capable of withstanding off-road impacts and heavy loads.
• Adjustable alignment cams at the axle, allowing for precise caster adjustments to improve steering response and tire wear.
• Complete with replacement coil springs designed to lift the vehicle approximately 4 inches, providing increased ground clearance and a commanding stance.
• Stealth coil springs that maintain a balanced ride quality, ensuring comfort both on and off the road.
• Included sway bar drops and a rear block & u-bolt kit to restore proper suspension geometry and support load-carrying capacity.
• Manufactured in the United States, ensuring high-quality craftsmanship and materials.
• GTIN: 00674866104754, reflecting its authenticity and compliance with industry standards.
• Designed specifically for the 4WD gas models of the Ford F250 and F350, ensuring a perfect fit and seamless installation.
• Compatible with a variety of off-road accessories and upgrades, making it a versatile choice for custom builds and performance enhancements.

Construction & Design

The Fabtech Radius Arm System is built with durability and performance in mind. The tubular radius arms are crafted from high-strength steel, providing a robust foundation that resists bending and flexing under demanding conditions. Dimple die side plates add additional reinforcement, ensuring the arms can withstand impacts from rocks, debris, and rough terrain.

The adjustable alignment cams are precision-machined components that allow for fine-tuning of caster angles, which is critical for maintaining proper steering geometry and tire contact patch. The coil springs are engineered to provide a lift of approximately 4 inches, balancing off-road clearance with ride comfort. The inclusion of sway bar drops and rear blocks ensures that the suspension maintains proper geometry after lift installation, preventing handling issues and uneven tire wear.

This system is designed for straightforward bolt-on installation, utilizing factory mounting points and hardware. The components are TIG-welded for superior strength and finish, ensuring long-lasting performance and resistance to corrosion. Overall, the design choices in this kit optimize your truck's off-road capabilities while maintaining a smooth, controlled ride on paved roads.

Performance & Sound

With the Fabtech Radius Arm System installed, your Ford F250 or F350 will experience noticeable improvements in off-road capability and overall handling. The increased ground clearance allows for better obstacle clearance, while the reinforced radius arms provide stability and confidence during spirited driving or challenging terrain. The coil springs deliver a balanced ride, absorbing bumps and impacts effectively, whether you're on the highway or trail.

While this system primarily focuses on performance and durability, you may also notice a slight increase in vehicle stance and a more aggressive appearance. The suspension's design ensures that your truck remains stable and predictable, with improved steering response thanks to the adjustable caster alignment. This upgrade is perfect for off-road enthusiasts, work trucks, or anyone looking to enhance their vehicle's capability and look.

Installation & Fitment

The Fabtech Radius Arm System is a bolt-on upgrade that is designed for ease of installation. Using factory mounting points and hardware, most experienced DIY enthusiasts or professional installers can complete the installation without the need for cutting, drilling, or extensive modifications. It is recommended to perform a proper wheel alignment after installation to ensure optimal handling and tire wear.

No cutting, drilling, or special tuning is required, making this a straightforward upgrade for your Ford F250 or F350 4WD gas truck. The system is engineered to fit perfectly, restoring factory ride quality and handling characteristics while providing the added benefits of increased lift and off-road capability.

What's Included

• Full set of tubular radius arms with dimple die side plates
• Replacement coil springs (approximately 4-inch lift)
• Adjustable caster alignment cams
• Sway bar drop brackets
• Rear block and u-bolt kit
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Off-road enthusiasts seeking increased ground clearance and durability
• Owners looking to improve vehicle stance and appearance
• Performance-minded drivers who want a reliable suspension upgrade
• Work trucks that require enhanced load-carrying capacity and stability