Fabtech K2227DL 4″ Radius Arm System With Front Dirt Logic 4.0 Resi Coilovers & Rear DIrt Logic 2.25 Shocks

2017-2022 Ford F-250 4WD Diesel 2017-2022 Ford F-350 4WD Diesel

Radius Arm Lift System

Brand : Fabtech
SKU : BKBNK2227DL
Part Number : K2227DL

4.9257950530035 849 5

98.515901060071%

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Product Details

Designed for 2017-2022 Ford F250 and F350 4WD models, Fabtech’s 4" Radius Arm System with Dirt Logic 4.0 Coilover Conversion is engineered to handle the extreme on-road and off-road demands of Super Duty truck enthusiasts. This system is a heavy-duty upgrade over the factory suspension, delivering increased strength, control, and performance.

The foundation of this lift kit is Fabtech’s legendary tubular Radius Arms. Developed from decades of off-road racing experience, the tubular design delivers exceptional strength while maintaining a smooth and compliant driving experience. This suspension system is equally capable of conquering rugged off-road terrain and maintaining excellent manners during daily driving.

A heavy-duty track bar relocation bracket is included to properly center the front axle under the vehicle. This correction allows full lock-to-lock steering with 12.50" wide tires on 5" backspacing wheels, ensuring proper tracking and predictable handling.

The front suspension is upgraded with Fabtech’s Dirt Logic 4.0 coilover conversion, the most advanced shock system available for the Super Duty platform. These massive coilovers provide outstanding off-road damping performance while maintaining a comfortable highway ride. The coilovers bolt directly into the factory coil spring bucket without requiring removal.

The Dirt Logic 4.0 coilovers feature stainless steel shock bodies for maximum corrosion resistance and durability. Each coilover is paired with a massive 4" diameter aluminum remote reservoir mounted horizontally above the shock, allowing full compression travel with oversized tires while improving heat dissipation during aggressive off-road use.

The rear suspension is lifted using 5" rear blocks, extended bump stop brackets, and Dirt Logic 2.25 shocks to maintain balanced ride quality, stability, and load-carrying capacity.

This 4" Radius Arm System with Dirt Logic 4.0 coilovers is the ultimate suspension upgrade for Super Duty owners who demand premium performance, aggressive styling, and the ability to tackle the toughest terrain with confidence.

The system includes a free 5-year / 60,000-mile powertrain warranty.

Fabtech's 4" Radius Arm system with the Dirt Logic 4.0 Coilover conversion has been built for the Ford Super Duty to handle the on and offroad demands of the truck enthusiast. This Radius Arm system is a heavy duty upgr

Radius Arm Lift System; 4 in.;;

Unsurpassed Strength And Performance
Patent Pending Radius Arms
Fully Tubular Structure
Dimple Die Side Plates
Adjustable Alignment Cam Allows Caster Adjustment

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Fitment

Years	Make	Model	Drive	Engine
2017-2022	Ford	F-250	4WD	Diesel
2017-2022	Ford	F-350	4WD	Diesel

Features

Replacement Radius Arms: Heavy-duty tubular radius arms provide increased strength, durability, and improved suspension geometry over factory components.
Dirt Logic 4.0 Coilover Conversion: Massive stainless steel coilovers deliver exceptional off-road damping with a smooth, controlled on-road ride.
Remote Reservoir Design: 4" diameter aluminum reservoirs dissipate heat efficiently for consistent damping in extreme off-road conditions.
Track Bar Relocation Bracket: Heavy-duty 1/4" thick steel bracket centers the front axle under the vehicle and eliminates deflection throughout suspension travel.
Adjustable Radius Arm Caster: Integrated alignment cams allow an additional 1.5-2 degrees of caster adjustment for improved handling with oversized tires.
Dropped Pitman Arm: Forged steel pitman arm corrects steering geometry and works with the factory drag link and extended track bar.
Sway Bar Drop Brackets: 1/4" thick steel brackets reposition the front sway bar to allow full suspension cycling without binding.
Front & Rear Bump Stop Brackets: Heavy-duty 1/4" thick steel brackets extend factory bump stops to prevent over-cycling and protect suspension components.
Brake Line Brackets: Reposition factory brake lines for increased suspension travel without opening the hydraulic system.
Steering Stabilizer Brackets: Retains the factory heavy-duty steering stabilizer using reinforced steel brackets to reduce tire shimmy.
Rear Lift Blocks: 5" cast iron rear blocks with integrated bump stops provide rear lift without affecting ride quality or load capacity.
Rear U-Bolts: Heavy-duty u-bolts securely attach the rear axle to the vehicle for maximum strength and reliability.
Dirt Logic 2.25 Rear Shocks: Stainless steel rear shocks with NitroSteel piston rods deliver excellent damping performance on and off-road.
Warranty Coverage: Includes a free 5-year / 60,000-mile powertrain warranty.

Components

1 × FTS22215 - Component Box
1 × FTS22309 - Rear Block Kit
1 × FTS835242D - Front Dirt Logic 4.0 Resi Coilover (Driver)
1 × FTS835242P - Front Dirt Logic 4.0 Resi Coilover (Passenger)
2 × FTS810052 - Rear Dirt Logic 2.25 Shock

FRONT DIRT LOGIC 4.0 RESI COILOVER

The Dirt Logic 4.0 provides the ultimate in hardcore offroad dampening capacity with superior highway comfort in a big package. This massive high end shock is designed for full size vehicles that required the biggest and best Coilover shock in a bolt on configuration. Nothing else comes close.

4.0″ OD Stainless Steel Body
3 5/8″ OD Billet Aluminum Piston
1 1/4″ NitroSteel® Black Piston Rod
Adjustable Coilover Construction
3/4″ Spherical Ball Mounting Ends
4.0″ OD Aluminum Resi

REAR DIRT LOGIC 2.25 SHOCK

Dirt Logic 2.25’s are designed to replace factory shocks with a larger, more robust configuration. The 2.25 size is what separates it from other replacement take apart shocks for a superior ride, both on and off road. Shocks are pretuned for each Fabtech suspension, accounting for larger tires, providing the finest all around damping.