7″ Radius Arm System w/ Dirt Logic 4.0 Resi Coilovers & Dirt Logic Shocks – K3079DL



2013-18 Ram 3500 4WD

Improving on the Ram’s new front suspension design this system includes replacement tubular Radius Arms with Fabtech’s exclusive dimple die side plates for superior strength and a rugged appearance. These new Radius Arms provide increased caster for use with oversized tires and lifted suspension heights.

The system utilizes the factory upper coil bucket with support gussets for superior strength. The lower mounts weld to the axle housing and have cross support gussets for the factory Track Bar bracket.

The Dirt Logic 4.0 Resi Coilovers features a stainless steel body for maximum corrosion resistance with a remote billet aluminum reservoir. These Dirt Logic 4.0’s provide a super smooth highway ride with outstanding offroad damping for rough terrain. Heavy duty 1/4″ thick steel front Track Bar drop bracket centers the axle under the vehicle with the new ride height.

A Fabtech innovation on this system is the steel front bump extensions. They will not blow out like extra long urethane bump stops found in other aftermarket suspensions. No chance of spring and shock damage with the Fabtech steel extensions.

The rear suspension receives a block & u-bolt kit with bump stop extensions.


  • Front Dirt Logic 4.0 Resi Coilovers
  • Fabtech Radius Arms
  • Front & Rear Steel Bump Stop Extensions
  • Front Track Bar Bracket
  • Rear Block & U-bolt Kit

Part Numbers

Oty Part # Description
1 FTS23190 Component Box 1 w/ Dirt Logic Shocks
1 FTS23189 Component Box 2
2 FTS835122 Front Dirt Logic 4.0 Resi Coilover

  –  California Prop 65 Warning

    3. Non-dually models only.
    42. Will not fit gas motors.
    130. Will not fit factory air suspension.