Fabtech 5" Crawler System w/ Front Dirt Logic 2.5 Coilovers & Rear Performance Shocks - 2007-11 Jeep JK 4WD

For JK owners that require the ultimate in offroad performance Fabtech offers a 5" Crawler system that will allow use of 37" tall tires for aggressive offroad use. The front system features a conversion from the factory 4 link arms to our proven Radius Arm design. The adjustable Radius Arm links are constructed of 5/16" thick steel for maximum dent resistance with rotational urethane joints at each end for unrestricted articulation. These new Radius Arms mount to a 1/4" thick steel crossmember that bolts to the frame under the transmission. The front steering geometry is relocated via a dropped pitman arm. A Trac Bar relocation bracket keeps the arc of travel between the Trac Bar and Drag Link proper to reduce bump steer throughout the suspension travel. Lift is accomplished with replacement coil springs or a Coilover Conversion system with Dirt Logic 2.5 Coilovers for maximum performance both on and offroad. The rear system retains the factory 5 Link design but with extended length lower tubular arms that bolt to new side frame brackets. Installation of these frame brackets does not require the removal of the gas tank or welding. The upper links are replaced as well with a tubular style in the factory mounts. Both upper and lower links feature 5/16" thick wall links with adjustable rotational urethane ends. The rear Trac Bar is properly relocated to keep the rear axle tracking with the front axle for superior road handling at high speed. For increased ground clearance at the rear axle, we provide replacement shock mounts that allow trimming of the factory mounts. This allows an additional 1" of ground clearance over the factory mounts. We offer heavy duty replacement driveshafts to be used with this system for maximum driveline reliability.


Kit# K4041B

  • Use 37/12.50R17 tires w/ 17x8.5 wheels w/ 5” BS w/ minor trimming


Oty Part # Description
1 FTS24083BK Component Box 1
1 FTS24084BK Component Box 2
1 FTS24087BK Coilover Hoop Kit
1 FTS240881BK Front Dirt Logic 2.5 Resi Coilovers
1 FTS24086BK Rear Coil Springs
2 FTS6002 Rear Performance Monotube Shocks


Order required Accessories

  • 1  FTS94057  Front Driveshaft 2 & 4 Door Models

  • 1  FTS94051  Rear Driveshaft 2 Door Model only

  • 1  FTS94052  Rear Driveshaft 4 Door Model Only

*Kit Price does not Include Drive Shafts



Fabtech 5" Crawler System w/ Front Dirt Logic 2.5 Coilovers & Rear Performance Shocks - 2007-11 Jeep JK 4WD

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Front Dirt Logic 2.5 Resi Coilovers


Derived from our desert racing experience, the Dirt Logic 2.5 Coilover is an exceptional performance shock that has been developed for a variety of Coilover applications. The Dirt Logic 2.5 will provide incredible dampening capacity for aggressive offroad driving.


  • - 2.50" OD Steel Body
  • - 2.25" OD Billet Aluminum Piston
  • - 7/8" Induction Hardened Chrome Piston Rod
  • - Adjustable Coilover Construction
  • - 5/8" Spherical Ball or Urethane Mounting Ends
  • - 2.25" OD Reservoir w/-8 Stainless Steel O-ring Hose
  • - Black Anodized Finish

Rear Performance Monotube Shocks


Fabtech's Monotube Shock Absorbers feature high pressure nitrogen gas that reduces fade during aggressive offroad driving. The Monotube design allows for a larger piston compared to twin tube shocks with greater cooling efficiencies due to the single wall seamless tubing. An internal free floating dividing piston separates the nitrogen gas from fluid to eliminate foaming and shock fade. Each shock has been pretuned specifically for the vehicle application providing a superior ride quality.


  • - Monotube Construction
  • - Internal Floating Dividing Piston
  • - 14mm Hardened Chrome Piston Rod
  • - 46mm OD Piston
  • - Separated high pressure nitrogen gas
  • - Thick wall seamless tubing
  • - Inverted mounting position

Vehicle Make


Vehicle Model

Wrangler JK

Vehicle Year

2007, 2008, 2009, 2010, 2011

Special Fitment Notes

No special fitment notes.

Manufacture Part Number


Part Number


Free Shipping




Installation Difficulty


Installation Instructions

Not Available

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