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6" Radius Arm System w/Front Dirt Logic 4.0 Resi Coilovers & Rear Dirt Logic 2.25 Shocks - 2011-16 Ford F250 4WD

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Included Shocks

Fabtech continues its legendary Coilover Conversion systems with an all new design for the 2011-16 Super Duty. This new system utilizes the factory coil spring bucket for a fast, easy installation with an affordable price. The heavy duty bracketry allows the installation of the massive Dirt Logic 4.0 Remote Resi Coilover shocks.


Dirt Logic Coilovers are constructed with a Stainless Steel body and NitroSteel® piston rod for maximum corrosion resistance. The Dirt Logic 4.0 for 6” lift systems feature dual rate coil springs for a superior quality both on and offroad.


Kit# K2270DL

  • Use 315/70R17 tires w/ 17x8 wheels w/ 4 1/2” BS w/ minor trimming
  • Use 325/65R18 tires w/ 18x9.5 wheels w/ 4 3/4” BS w/ minor trimming
  • Use 35/12.50R20 tires w/ 20x10 wheels w/ 5” BS w/ minor trimming


Oty Part # Description
1 FTS22139 Component Box 1
1 FTS835234D Front Dirt Logic 4.0 Resi Coilover (Driver)
1 FTS835234P Front Dirt Logic 4.0 Resi Coilover (Passenger)
1 FTS22101 Rear Block Kit
2 FTS810052 Rear Dirt Logic 2.25 Shock



27. Front drive shaft modification may be required to clear exhaust on gas motors.

Front Dirt Logic 4.0 Stainless Steel Resi Coilovers

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
  • - 1.25" NitroSteel® Black Piston Rod
  • - Adjustable Coilover Construction
  • - 3/4" Spherical Ball Mounting Ends
  • - 4.0" OD Remote Resi

Dirt Logic 2.25 Stainless Steel Non Resi

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
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