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JKU 4.5 Inch Adventure-X Coil Over Long Arm System

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The Rock Krawler JKU 4.5 Adventure-X Coil Over Systems is the ultimate in compromise between daily driver/hard core off-roader. The Adventure-X systems combine the benefits of a full high clearance 4 link front suspension with a high clearance independent 3 link rear suspension. This is where conventional on road handling meets bad ass off-road ability. The rear system uses our tried and true independent 3 link conversion with X2 rear suspension geometry with enhanced rear instant center(s) and rear roll center(s). The new high clearance axle mounts provide 3.5” of ground clearance under the rear axle as compared to stock. The rear upper shock relocation brackets ensure you do not lose any shock or suspension travel. The combination of a full high clearance 4 link long arm front suspension and high clearance independent 3 link rear long arm suspension lets you dominate the streets and the trails.

System Benefits

  • Excellent Highway Ride
  • Improved Off-Road Ability
  • High Steer Upgrade
  • 2.625 RRD Front Coil Overs
  • High Clearance 4 Link Long Arm Front Suspension
  • High Clearance Independent 3 Link Long Arm Rear Suspension
  • Weld on Long Arm Mounting Brackets with Weld Scheduling just like OEM
  • Heat Shield thermal barrier products, just like OEM to protect the front control arm joints at the frame
  • 3.5” Rear Clearance Gain from the X2 Axle Bracket System
  • Adjustable Rear Anti-Squat Featuring X2 Geometry
  • Designed to be the Ultimate Compromise between On Highway Handling and Hard Core Off-Road Ability

System Includes:

  • (2) Front frame side coil over mounts
  • (2) Front axle side coil over mounts
  • (2) Front 2.625 RRD Coil Overs
  • (2)Front frame side weld-on long arm mount
  • (2) Heat Shield Products thermal barrier
  • (1) Front axle side weld-on track bar bracket
  • (1) Pro series drag link
  • (1) 1/4” thick laser cut steel cross member
  • (2) Front high clearance adjustable lower control arm
  • (2) Front adjustable upper control arm
  • (1) Front adjustable anti-wobble track bar
  • (1) Front sway bar disconnect kit
  • (2) Front triple rate coil spring
  • (2)2.25 RRD shocks
  • (2) Rear bump stop kit
  • (2) Rear frame side weld-on lower control arm mount
  • (2) Rear high clearance adjustable lower control arm
  • (1) Rear double adjustable upper control arm
  • (1) Rear adjustable anti-wobble track bar
  • (1) Rear weld-on dual sport track bar bracket
  • (1) Rear weld-on axle truss
  • (2) Rear frame side weld-on lower control arm mount
  • (2) Rear frame side weld-on shock mount
  • (2) Rear axle side high clearance control arm/shock/sway bar link mount
  • (2) Rear triple rate coil spring
  • (2) Front extended brake line
  • (2) Rear extended brake line

*hardware and detailed instructions

General Notes:

*All lift heights based on Rubicon models for standard style build (i.e. front bumper and winch, rear bumper and full size spare).

*If building with a spare delete we recommend dropping 1” in coil lift height for the rear.

*If building an overland or heavily upfitted build in the back, we recommend upsizing 1” in coil lift height for the rear

*Requires removal of many OEM brackets both at the frame and axles. See instructions for details.

*Requires welding of many Rock Krawler brackets both at the frame and axle. See instructions for details.

*Minor exhaust rerouting required before the collector on the driver's side to be done prior to the suspension system install.

*Recommend installation of limiting straps to avoid over extension of suspension components.

*This system pushes the rear axle back approximately 1”, to center the rear axle assembly and prevent larger tire from contacting the rock sliders and pinch seam.

*System designed for low pinion axles. Contact Rock Krawler for high pinion options.

*Recommend 4.5” of back spacing on rims for 33” and 35” tall tires.

*Recommend 3.5” of back spacing on rims for 37” tall tires.