Fabtech K2139DL

2011–2016 Ford F250 4WD

Part #: K2139DL

Overview

The Fabtech 8" Radius Arm System with DLSS 4.0 Coilover & Rear DLSS is a high-performance suspension upgrade designed specifically for Ford F250 4WD models from 2011 to 2016. This comprehensive system is engineered to maximize front suspension damping, providing a smoother, more controlled ride both on and off-road. Whether you're tackling rugged trails, hauling heavy loads, or seeking improved stability and handling, this kit offers the durability and performance you need.

Built for enthusiasts who demand the best in suspension technology, the Fabtech Radius Arm System enhances your vehicle's capability by replacing the factory coil spring mounts with heavy-duty, precision-crafted components. The system ensures proper impact load distribution across the frame, reducing stress on critical suspension points and extending the lifespan of your vehicle's components. The result is improved ride quality, better wheel articulation, and increased load-carrying capacity.

Key Features

The Fabtech K2139DL system incorporates advanced engineering and high-quality materials to deliver superior performance and durability. Key features include:

• Heavy-duty upper coilover mounts constructed with 1.75" diameter DOM tubing, replacing factory coil spring mounts for enhanced strength and impact load distribution.
• Robust lower mounts made from 1/4" thick steel, securely attaching to the axle housing to provide solid mounting points for the coilover shocks.
• Stainless Steel Dirt Logic 4.0 Coilover Conversion system, offering adjustable damping and superior corrosion resistance for long-lasting performance.
• Wide frame span design to accommodate larger tires and wheels, improving ground clearance and off-road capability.
• High-quality, TIG-welded construction ensuring precise fitment and durability under demanding conditions.
• Includes rear DLSS (Dual Load Support System) shocks, providing enhanced stability and control for heavy-duty applications.

Construction & Design

The Fabtech Radius Arm System features a meticulously engineered design utilizing stainless steel and high-strength steel components. The upper coilover mounts are crafted from 1.75" diameter DOM tubing, which offers excellent strength-to-weight ratio and impact resistance. The lower mounts are fabricated from 1/4" steel plate, TIG-welded for maximum durability and precision. The entire system is designed to distribute impact loads evenly across the frame, reducing stress and preventing premature wear.

The coilover shocks are part of Fabtech's renowned Dirt Logic 4.0 series, featuring stainless steel construction for corrosion resistance and adjustable damping to fine-tune ride quality. The wide frame span allows for increased tire clearance and improved wheel travel, making this system ideal for off-road adventures and heavy-duty use. The system's design ensures a precise fit, straightforward installation, and long-term reliability.

Performance & Sound

With the Fabtech 8" Radius Arm System, you'll experience significantly improved front suspension damping, resulting in a smoother ride and enhanced handling. The upgraded coilover shocks provide adjustable damping, allowing you to tailor the ride characteristics to your driving style and terrain. The system's robust construction minimizes body roll and improves wheel articulation, giving you better traction and control in challenging off-road conditions.

While this kit is primarily focused on performance and durability, it also contributes to a more confident driving experience by reducing vibrations and harshness typically associated with heavy-duty suspension setups. The stainless steel shocks operate quietly and resist corrosion, ensuring consistent performance over time.

Installation & Fitment

The Fabtech K2139DL system is designed as a bolt-on upgrade, with all necessary components included for a straightforward installation. The system mounts directly to factory frame points and axle locations, requiring no cutting or welding. Some mechanical aptitude and basic tools are recommended, but no specialized modifications are necessary. Proper alignment and torque specifications should be followed to ensure optimal performance and safety.

• Installation typically requires 4–6 hours depending on experience.
• No cutting, drilling, or tuning is required.
• Compatible with factory or aftermarket wheels and tires designed for 8" lift.

What's Included

• Front coilover shocks with stainless steel construction
• Upper coilover mounts with 1.75" DOM tubing
• Lower steel mounts (1/4" thick)
• Radius arms and associated hardware
• Rear DLSS shocks
• All necessary brackets, bushings, and mounting hardware
• Installation instructions

Ideal For

• Off-road enthusiasts seeking maximum suspension travel and durability
• Heavy-duty towing and hauling applications
• Ford F250 owners looking to upgrade their suspension for improved ride quality and load capacity
• Custom builders and performance shops aiming for a reliable, high-performance lift system

Emissions Note

This product is designed for off-road use and may not be CARB-compliant. Please check local regulations before installation if you intend to register your vehicle for street use.