Fabtech Radius Arm System

2011–2013 Ford F450/F550 4WD 10-Lug

Part #: K2156M

Overview

The Fabtech 6" Radius Arm System with Coils & Stealth is a comprehensive suspension upgrade designed specifically for Ford F450 and F550 4WD trucks from 2011 to 2013. Engineered to enhance off-road capability, improve ride quality, and provide a commanding stance, this system is ideal for enthusiasts who demand durability and performance from their heavy-duty trucks. Whether you're tackling challenging terrain or seeking a bold new look, this kit delivers reliable, high-quality components that support your vehicle's heavy-duty applications.

Designed with precision and built in the United States, the Fabtech Radius Arm System offers a significant lift with a full tubular structure reinforced by dimple die side plates. This construction ensures maximum strength and longevity, even under demanding conditions. The system includes adjustable alignment cams at the axle, allowing you to fine-tune caster angles for optimal handling and steering response. The front spring lift is achieved with 6-inch replacement coil springs, providing increased ground clearance and a more aggressive stance. Completing the kit are essential components such as a trac bar relocation bracket, Pitman arm, sway bar drops, and a rear block & u-bolt kit, ensuring a comprehensive upgrade that maintains proper alignment and drivability.

Key Features

The Fabtech Radius Arm System is built with durability and performance in mind, featuring:

• Heavy-duty tubular radius arms with dimple die side plates for enhanced strength and impact resistance.
• Adjustable alignment cams at the axle to allow precise caster adjustments, improving steering stability and handling.
• 6-inch replacement coil springs designed to lift the front of the vehicle while maintaining ride quality and load capacity.
• Trac bar relocation bracket to ensure proper axle positioning and prevent wandering or misalignment during off-road use.
• Heavy-duty Pitman arm and sway bar drop brackets to restore factory geometry and improve handling characteristics.
• Rear block and U-bolt kit for a balanced, level stance and increased rear clearance.
• Manufactured in the United States with high-quality materials for long-lasting performance in demanding environments.

Construction & Design

The Fabtech Radius Arm System features a full tubular design for maximum strength and durability. The radius arms are reinforced with dimple die side plates, which add structural integrity and impact resistance, making them suitable for off-road adventures and heavy-duty applications. The system's components are engineered with precision CAD development, ensuring a perfect fit and seamless integration with your truck's existing chassis and suspension geometry.

The 6-inch coil springs are designed to provide a substantial lift while maintaining a comfortable ride. The inclusion of sway bar drops and a trac bar relocation bracket ensures that factory handling characteristics are preserved or improved, even with the added height. All components are finished with durable coatings to resist corrosion and wear, ensuring your suspension system remains reliable over time.

Performance & Sound

This suspension upgrade enhances your truck's off-road capability by increasing ground clearance and improving wheel articulation. The adjustable caster cams allow you to optimize steering response and stability, especially when navigating uneven terrain. The system's robust construction minimizes flex and deflection, translating into more precise handling and a confident driving experience. While primarily focused on performance and durability, the kit also contributes to a more commanding visual presence on the road or trail.

Installation & Fitment

The Fabtech Radius Arm System is designed as a bolt-on upgrade, making installation straightforward for experienced DIY enthusiasts or professional installers. The kit utilizes existing factory mounting points and requires no cutting or drilling in most cases. Proper alignment and setup are recommended after installation to ensure optimal handling and tire wear. Due to the comprehensive nature of the system, some basic mechanical skills and tools are necessary to complete the installation successfully.

• All necessary components, including radius arms, coil springs, trac bar bracket, Pitman arm, sway bar drops, and rear block & u-bolt kit, are included.
• No cutting, drilling, or extensive modifications are required in most applications.
• Professional alignment is recommended to achieve the best handling and ride quality.

What's Included

• Heavy-duty tubular radius arms with impact-resistant dimple die side plates
• 6-inch replacement coil springs
• Trac bar relocation bracket
• Heavy-duty Pitman arm
• Sway bar drop brackets
• Rear block and U-bolt kit
• All necessary hardware and mounting components

Ideal For

• Off-road enthusiasts seeking increased ground clearance and wheel articulation
• Heavy-duty truck owners needing a reliable lift system for towing or hauling
• Customizers aiming for a bold, aggressive stance
• Drivers who want to improve handling and stability on challenging terrains

Emissions Note

This product is designed to meet or exceed industry standards and is suitable for use in emissions-compliant vehicles. However, always verify local regulations before installation, as some modifications may affect emissions compliance.