Fabtech K20112M

2005–2007 Ford F350 4WD

Part #: K20112M

Overview

The Fabtech 6" Radius Arm System with Coils & Stealth for the Ford F350 4WD is a comprehensive suspension upgrade designed to enhance off-road capability, improve ride quality, and provide increased wheel travel for demanding terrains. Built with durability and performance in mind, this system is ideal for enthusiasts who want to take their heavy-duty truck to the next level, whether for off-road adventures, towing, or improved on-road handling.

This system replaces the factory suspension components with a robust, engineered setup that offers increased ground clearance and better articulation. The inclusion of heavy-duty radius arms, coil springs, and a rear block & u-bolt kit ensures a reliable and long-lasting upgrade. The addition of a trac bar relocation bracket, Pitman arm, and sway bar drops further refines the vehicle's handling and stability, making it suitable for both daily driving and aggressive off-road use.

Key Features

Fabtech's patented radius arm design features a full tubular structure reinforced with dimple die side plates, providing exceptional strength and durability to withstand tough off-road conditions. The adjustable alignment cam at the axle allows for precise caster adjustments, ensuring proper alignment and steering response after installation. This flexibility helps maintain factory-like handling characteristics while accommodating larger tires and lifted ride height.

• Heavy-duty, tubular radius arms with dimple die reinforcement for maximum strength and durability
• Adjustable alignment cam at the axle for precise caster adjustment
• Replacement front coil springs designed to support a 6-inch lift and maintain ride quality
• Rear block and u-bolt kit to provide additional lift and stability
• Trac bar relocation bracket to correct axle positioning and improve steering response
• Pitman arm and sway bar drops included to optimize steering geometry and handling
• Manufactured in the United States with high-quality materials for long-lasting performance

Construction & Design

The Fabtech 6-inch Radius Arm System is constructed from high-strength steel, with the radius arms featuring a full tubular design for maximum rigidity. The dimple die side plates add extra reinforcement, preventing flex and ensuring longevity under heavy loads and off-road impacts. The coil springs are engineered to provide a smooth ride while supporting the increased lift height, and the rear block & u-bolt kit is designed for easy installation and reliable support.

The system's components are precisely engineered to work together seamlessly, with CAD-developed parts ensuring perfect fitment and alignment. The inclusion of a trac bar relocation bracket and sway bar drops helps maintain factory steering geometry, reducing bump steer and improving overall handling. The Pitman arm is designed to restore proper steering angles, ensuring responsive and predictable steering behavior.

Performance & Sound

With this suspension upgrade, your Ford F350 will experience improved off-road articulation, increased ground clearance, and a more commanding stance. The system enhances wheel travel and stability, allowing you to confidently tackle rough terrain. While primarily focused on performance and durability, the system also maintains a comfortable ride quality for daily driving. The upgraded components contribute to a more controlled and stable ride, especially when navigating uneven surfaces.

Installation & Fitment

The Fabtech 6" Radius Arm System is designed as a bolt-on upgrade, making installation straightforward for experienced DIY enthusiasts or professional installers. The system uses factory mounting points and requires no cutting or welding. Some alignment adjustments may be necessary after installation to ensure optimal handling and tire wear. Basic hand tools and a lift or jack are recommended for installation.

• Designed specifically for 2005–2007 Ford F350 4WD models
• Installation typically requires 4–6 hours depending on experience
• No cutting, drilling, or welding required

What's Included

• Heavy-duty tubular radius arms with dimple die reinforcement
• Front coil springs for 6-inch lift
• Rear block and u-bolt kit
• Trac bar relocation bracket
• Pitman arm
• Sway bar drop brackets
• All necessary hardware and mounting components

Ideal For

• Off-road enthusiasts seeking increased ground clearance and wheel travel
• Heavy-duty truck owners who tow or haul frequently
• Drivers wanting a durable, reliable suspension upgrade for demanding conditions
• Those looking to improve vehicle stance and appearance