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Fabtech K2273DL 8″ Radius Arm System With Front Dirt Logic 4.0 Resi Coilovers & Rear Dirt Logic 2.25 Shocks

2011-2016 Ford F-250 4WD
Fabtech K2273DL 8″ Radius Arm System With Front Dirt Logic 4.0 Resi Coilovers & Rear Dirt Logic 2.25 Shocks
5953.17In stock
2011-2016 Ford F-250 4WD

Radius Arm Lift System

  • Brand : Fabtech
  • SKU : BKBNK2273DL
  • Part Number : K2273DL
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Product Details

Designed for 2011-2016 Ford F250 4WD models, Fabtech’s Radius Arm System is engineered to handle the demanding on-road and off-road needs of Super Duty enthusiasts. This complete suspension upgrade delivers increased strength, improved geometry, and reliable performance when running oversized tires.

The foundation of this high-quality system is Fabtech’s tubular Radius Arms. Drawing from Fabtech’s extensive off-road racing experience, these arms feature a tubular construction reinforced with a dimple-die side plate and heavy gusseting for maximum durability. This design provides a significant strength upgrade over the factory stamped radius arms.

Included in the system is the massive Dirt Logic 4.0 Coilover Conversion, delivering outstanding off-road damping performance while maintaining a smooth and controlled highway ride. The coilover bolts directly into the factory coil spring location without requiring removal of the stock coil bucket, allowing for a clean and efficient installation.

The Dirt Logic 4.0 Coilover features a giant 4-inch diameter aluminum remote reservoir mounted horizontally above the coilover, allowing full compression travel even with oversized tires. As the largest and most robust coilover available for the Ford Super Duty, it is built to handle the harshest driving conditions.

Properly engineered suspension geometry and premium components set this Radius Arm system apart from all others in its class. This complete suspension system is backed by a free 5-year, 60,000-mile powertrain warranty for added peace of mind.

Our patented Radius Arms feature a full tubular structure strengthened by dimple die side plates with an adjustable alignment cam at the axle to allow caster adjustment. Front spring lift options includes 6 replacement

Radius Arm Lift System; 8 in. Lift; Incl. Front Dirt Logic 4.0 Resi Coilover and Rear Dirt Logic 2.25 Shocks; For Vehicles w/o Factory Overloads;;

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

YearsMakeModelDrive
2011-2016FordF-2504WD

Features

  • Radius Arms: Tubular construction with dimple-die side plates and heavy gusseting provides superior strength over factory arms. Offset design allows full turning radius with 15.50-inch wide tires on 5-inch backspacing wheels. Adjustable alignment cams offer an additional 1.5-2 degrees of caster adjustment, while Fabtech’s proprietary 5 Ton Joints at the frame pivot ensure long service life with quiet operation.
  • Dirt Logic 4.0 Coilover Conversion: Heavy-duty 1/4-inch thick steel brackets utilize the factory coil bucket to mount the massive Dirt Logic 4.0 coilover. Features a 4-inch diameter stainless steel body with a 1.25-inch NitroSteel piston rod for maximum corrosion resistance and durability. Coil springs support vehicle weight while providing 2 inches of increased wheel travel, and the remote aluminum reservoir dissipates heat for consistent damping in extreme conditions.
  • Track Bar Bracket: 1/4-inch thick steel bracket repositions the factory track bar to properly center the front axle at the new ride height. Box-style construction minimizes deflection throughout the suspension travel.
  • Dropped Pitman Arm: Forged steel construction exceeds factory strength specifications and is designed to work with the factory drag link and Fabtech track bar bracket for proper steering geometry.
  • Front Bump Stop Brackets: Heavy-duty 1/4-inch thick steel brackets extend the factory bump stops to prevent suspension over-cycling. Semi-boxed construction handles full compression loads of the Super Duty platform.
  • Sway Bar Brackets: 1/4-inch thick steel drop brackets reposition the front sway bar to allow full suspension travel without binding at increased ride height.
  • Brake Line Brackets: Reposition factory brake lines lower on the frame to accommodate increased suspension travel while keeping the brake system sealed and intact.
  • Steering Stabilizer Brackets: Retains the factory heavy-duty steering stabilizer using reinforced steel brackets and support braces to reduce tire shimmy.
  • Driveshaft Shim Kit: Allows fine adjustment of rear driveline angles on two-piece driveshaft applications to eliminate vibration after lifting.
  • Rear Add-a-Leaf: Single leaf insert increases rear lift by approximately 1.5 inches while maintaining factory ride quality.
  • Rear Lift Blocks: Cast iron 5-inch rear lift blocks provide additional height without reducing load capacity or ride comfort.
  • Rear Sway Bar Brackets: Reposition rear sway bar end links to maintain proper function and prevent binding at the new ride height.
  • Rear U-Bolts: Heavy-duty U-bolts securely attach the rear differential to the vehicle, ensuring long-term reliability.
  • Dirt Logic 2.25 Rear Shocks: Stainless steel body with NitroSteel piston rod provides excellent corrosion resistance, superior ride quality, and consistent damping performance both on and off-road.

Components

  • 1 × FTS22139 - Component Box
  • 1 × FTS22104 - Rear Box Kit
  • 1 × FTS835236D - Front Dirt Logic 4.0 Resi Coilover [Driver]
  • 1 × FTS835236P - 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.

  • 2.25″ OD Stainless Steel Body
  • 2.0″ OD Billet Aluminum Piston
  • 7/8″ NitroSteel® Black Piston Rod
  • Polyurethane Mounting Ends

Quick Specs

  • Tire Size – 355/65R18 Wheel Size – 18×9.5 w/ 4 3/4in BS w/minor trimming
  • Tire Size – 37/13.50R20 Wheel Size – 20×10 w/ 4 1/2in BS w/minor trimming
  • Part Number : K2273DL

Important Notes

  • California Prop 65 Warning
  • 27. Front drive shaft modification may be required to clear exhaust on gas motors.

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