FABTECH 10" Radius Arm System w/ Dirt Logic 4.0 Coilovers & Rear Dirt Logic Shocks (K2153DB) View larger

FABTECH 10" Radius Arm System w/ Dirt Logic 4.0 Coilovers & Rear Dirt Logic Shocks (K2153DB)


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10" Radius Arm System w/ Dirt Logic 4.0 Coilovers & Rear Dirt Logic Shocks - 2011-14 Ford F350 4WD & 2011-13 Ford F450 (8 Lug) 4WD

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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 lift includes the Dirt Logic 4.0 Coilover Shock conversion. Completing this system is a Trac Bar relocation bracket, Pitman Arm, Sway Bar drops, replacement rear Leaf Springs, and a Block & U-bolt kit.


Kit# K2153DB

  • Use 40/12.50R17 tires w/ 17x9 wheels w/ 4 5/8” BS w/ minor trimming
  • Use 40/135.0R20 tires w/ 20x10 wheels w/ 4 1/2” BS w/ minor trimming


Oty Part # Description
1 FTS22144 Component Box 1
1 FTS22146 Component Box 2
2 FTS835011 Front Dirt Logic 4.0 Coilover
1 FTS22108 Rear Block & Leaf Spring Kit
2 FTS810651 Rear Dirt Logic 2.25 Non Resi



3. Non dually models.
27. Front drive shaft modification may be required to clear exhaust on gas motor.
29. Rear leaf springs may reduce load carrying capacity

Front Dirt Logic 4.0 Coilovers

As the largest vehicle specific take apart, monotube shock on earth, the Dirt Logic 4.0 continues to expand its applications to include a remote reservoir style for GM and Dodge. The Dirt Logic 4.0 will provide the ultimate in hardcore offroad dampening capacity with superior highway comfort. Nothing else comes close.

  • - 4.0" OD Steel Body
  • - 3 5/8" OD Billet Aluminum Piston
  • - 1.25" Induction Hardened Chrome Piston Rod
  • - Adjustable Coilover Construction
  • - 3/4" Spherical Ball Mounting Ends
  • - 4.0" OD Piggyback Reservoir or Remote Reservoir
  • - Black Anodized Finish

Rear Dirt Logic 2.25 Non Resi

The new standard in large diameter mono tube shocks for lifted applications in the OE position as well as multiple shock applications, the 2.25 provides unparalled shock performance. Available with and without reservoir the Dirt Logic 2.25 offers a supple highway ride with outstanding offroad dampening.

  • - 2.25" OD Steel Body
  • - 2.0" OD Billet Aluminum Piston
  • - 7/8" Induction Hardened Chrome Piston Rod
  • - Polyurethane Mounting Ends
  • - Optional 2.25" OD Reservoir w/-8 Stainless Steel O-ring Hose
  • - Black Anodized Finish