Fabtech Radius Arm System

2005–2007 Ford F250 4WD with Factory Overload

Part #: K20121DL

Overview

The Fabtech 6" Radius Arm System with DLSS 4.0 Coilover & Rear DLSS is a comprehensive suspension upgrade designed specifically for 2005–2007 Ford F250 4WD trucks equipped with factory overload springs. This system provides a significant lift height while maintaining excellent ride quality, durability, and off-road capability. Whether you're looking to improve your truck's ground clearance for off-road adventures or enhance its towing and hauling performance, this kit offers a reliable and performance-oriented solution.

Built for enthusiasts who demand both strength and versatility, the Fabtech Radius Arm System combines advanced engineering with high-quality materials to deliver a smooth, controlled ride on and off the pavement. The system is ideal for those seeking a substantial lift without sacrificing the factory ride comfort or handling characteristics of their F250.

Key Features

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

• Full tubular radius arms reinforced with dimple die side plates provide increased strength and durability, ensuring long-lasting performance under demanding conditions.
• An adjustable alignment cam at the axle allows for precise caster adjustment, helping to optimize steering geometry and tire wear after installation.
• The front lift is achieved through the Dirt Logic 4.0 Stainless Steel Coilover Shock conversion, offering adjustable damping for tailored ride quality and improved off-road performance.
• A comprehensive package includes a Trac Bar relocation bracket, Pitman Arm, sway bar drops, and other components to ensure proper alignment and handling.
• The rear lift is supported by a block and u-bolt kit, providing a balanced and level stance for your truck.
• Includes front and rear 2.25-inch Dirt Logic Stainless Steel shocks, designed to withstand harsh off-road conditions while providing a smooth ride.
• Manufactured with high-grade materials, ensuring corrosion resistance and longevity in rugged environments.
• Designed with a focus on maintaining factory ride quality and handling characteristics, even with the increased lift height.
• Compatible with factory overload springs, preserving the truck's original load-carrying capacity and ride comfort.

Construction & Design

The Fabtech Radius Arm System is engineered with precision and durability in mind. The tubular radius arms are constructed from high-strength steel, featuring dimple die side plates that add structural integrity without unnecessary weight. The adjustable cam at the axle allows for fine-tuning of caster angle, which is critical for steering response and tire wear.

The front coilover conversion utilizes stainless steel shocks from Dirt Logic, known for their corrosion resistance and consistent damping performance. The coilovers are adjustable, enabling you to customize ride height and damping settings to suit your driving style and terrain. The rear block and u-bolt setup is designed for easy installation and reliable support, ensuring your truck maintains a level stance after lifting.

All components are engineered to fit seamlessly with the factory chassis and suspension geometry, minimizing the need for extensive modifications. The system's design emphasizes strength, longevity, and performance, making it suitable for both daily driving and off-road adventures.

Performance & Sound

This suspension system significantly enhances your truck's off-road capability by increasing ground clearance and improving wheel travel. The adjustable coilovers allow for tailored damping, providing better control over rough terrain while maintaining comfort on paved roads. The upgraded shocks and reinforced radius arms help reduce body roll and improve handling stability.

While primarily focused on performance and durability, the system also offers a more commanding stance and aggressive appearance. The stainless steel shocks contribute to a quieter, more refined ride, free from rattles or squeaks often associated with lower-quality suspension components.

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 uses existing factory mounting points and requires no cutting or welding in most cases. Proper alignment is recommended after installation to ensure optimal handling and tire wear.

Due to the comprehensive nature of the kit, some minor adjustments to the steering and suspension components may be necessary. Towing and payload capacities are preserved, and the system is engineered to work seamlessly with factory overload springs, maintaining your truck's original load-carrying capabilities.

What's Included

• Full set of tubular radius arms with dimple die side plates
• Adjustable caster cam at the axle
• Front Dirt Logic 4.0 Stainless Steel Coilover Shocks
• Rear block and u-bolt kit
• Trac Bar relocation bracket
• Pitman Arm
• Sway Bar drop brackets
• All necessary hardware and mounting components
• Installation instructions

Ideal For

• Off-road enthusiasts seeking increased ground clearance and improved wheel travel
• Heavy-duty towing and hauling with enhanced suspension support
• Truck owners wanting a reliable, high-performance lift kit that maintains factory ride quality
• Customizers aiming for a balanced combination of height, strength, and durability