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Fabtech K2275DL 8″ Radius Arm System With Front Dirt Logic 4.0 Resi Coilovers & Rear Dirt Logic 2.25 Shocks

2011-2016 Ford F-250 4WD 2011-2016 Ford F-350 4WD
Fabtech K2275DL 8″ Radius Arm System With Front Dirt Logic 4.0 Resi Coilovers & Rear Dirt Logic 2.25 Shocks
6703.36In stock
2011-2016 Ford F-250 4WD 2011-2016 Ford F-350 4WD

Radius Arm Lift System

  • Brand : Fabtech
  • SKU : BKBNK2275DL
  • Part Number : K2275DL
4.9257075471698 848 5
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Product Details

Special Shipping Required. This item must be shipped via truck freight and requires delivery to a business address equipped with a dock or forklift.

Fabtech’s Radius Arm System for the Ford Super Duty is engineered to meet the demanding on-road and off-road requirements of truck enthusiasts. This complete suspension upgrade replaces key factory components to deliver increased strength, improved geometry, and long-term durability when running oversized tires.

At the core of this system are Fabtech’s heavy-duty tubular Radius Arms. Inspired by Fabtech’s race-proven suspension components, these arms feature a tubular structure reinforced with dimple-die side plates and heavy gusseting for rugged off-road use. This design offers a significant strength upgrade over factory stamped arms.

This system includes the massive Dirt Logic 4.0 Coilover Conversion, providing outstanding off-road damping capability while maintaining a smooth and controlled highway ride. The coilovers bolt directly into the factory coil spring location without requiring removal of the original coil bucket, ensuring a clean and efficient installation.

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

High-quality components combined with properly engineered suspension geometry set this Radius Arm system apart from other Radius Arm suspensions. The system includes a free 5-year, 60,000-mile powertrain warranty for added peace of mind.

Each Fabtech component has been designed with specific features and benefits that create this premium suspension system. Detailed component information is outlined below.

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;;

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
2011-2016FordF-3504WD

Features

  • Radius Arms: Tubular construction reinforced with dimple-die side plates and heavy gusseting provides superior strength over factory stamped 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 Joint at the frame pivot delivers quiet operation and extended service life proven in military applications.
  • 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 the weight of the Super Duty while providing 2 inches of increased wheel travel, and the remote aluminum reservoir dissipates heat for consistent damping during extreme off-road use.
  • Track Bar Relocation Bracket: 1/4-inch thick steel bracket repositions the factory track bar to properly center the front axle at the increased 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 to maintain 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 is engineered to withstand full compression impacts 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 the increased ride height.
  • Brake Line Brackets: Reposition the factory brake lines lower on the frame to accommodate increased suspension travel while keeping the brake system sealed and intact.
  • Steering Stabilizer Brackets: Retain the factory heavy-duty steering stabilizer using reinforced steel brackets and support braces to help reduce tire shimmy.
  • Driveshaft Shim Kit: Allows incremental rear driveline angle adjustment at the carrier bearing on two-piece driveshaft applications to eliminate vibration caused by increased ride height.
  • Rear Leaf Springs: High-quality Canadian spring steel forms a four-leaf spring pack with a bottom overload leaf for improved load-carrying capability. Each leaf features tip liners to reduce friction and vulcanized spring eye bushings for a smooth and quiet ride.
  • Rear Sway Bar Brackets: Reposition rear sway bar end links to maintain proper sway bar 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 strength and 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 on and off-road.

Components

  • 1 × FTS22139 - Component Box
  • 1 × FTS22114 - Rear Leaf Spring 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 : K2275DL

Important Notes

  • California Prop 65 Warning
  • 3. Non dually models only.
  • 27. Front drive shaft modification may be required to clear exhaust on gas motor.
  • 29. Rear springs may reduce load carrying capacity.
  • 170. Vehicle may not sit level due to factory rear options.

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