Rock Krawler JL45AX2NL-4CS 4.5 Inch Adventure-X No Limits Long Arm Coil Over Suspension System

The Rock Krawler JL45AX2NL-4CS is a 4.5-inch Adventure-X No Limits Long Arm Coil Over suspension system engineered to deliver the ideal balance between daily street performance and serious off-road capability. Designed and manufactured in the USA, this complete long arm lift kit replaces the factory geometry with a purpose-built platform that transforms the way the vehicle handles both on and off the trail.

The Adventure-X designation reflects the inclusion of eight fully adjustable control arms featuring Rock Krawler's 100% service-free Adventure Series joints. These long arms offer up to 70 degrees of total misalignment, dramatically reducing the inherent bind of factory control arms and allowing precise tuning of caster and pinion angle front and rear.

The No Limits designation refers to the inclusion of specially designed front sway bar links that allow Rubicon owners to continue using the factory electronic sway bar disconnect feature while still achieving full suspension articulation. These links feature a CNC-machined billet aluminum center section and Made-in-USA FK Bearing heim joints with factory-compatible hardware.

Key Features:

• 4.5 inches of lift over stock Rubicon ride height
• High clearance 4-link long arm front suspension combined with an independent 3-link long arm rear suspension
• X2 rear suspension geometry with enhanced rear instant centers and roll centers for improved handling dynamics
• High clearance X2 axle bracket system delivers 4.5 inches of additional ground clearance under the rear axle
• Weld-on rear upper shock mounts, rear axle side control arm mount, rear track bar mount, and rear axle truss included
• Rear upper shock relocation brackets preserve maximum shock and suspension travel
• Rock Krawler triple-rate coil springs provide superior on-road comfort over OEM linear-rate springs with proper free-length for off-road articulation
• Track bar geometry correction brackets, front and rear, for precise axle centering
• Spring correction pads to eliminate factory spring bow
• Heat shield thermal barrier products protect front control arm joints at the frame
• 4-door configuration (4CS)

Installation Notes:

• Requires welding of front and rear long arm mounts and coil over mount on axle
• Requires removal of OEM frame-side lower and upper control arm mounts (front and rear)
• Requires removal of OEM axle-side rear lower control arm and track bar mounts
• Requires modifying OEM rear shock mounts and welding of raised rear upper shock mounts
• Installation of limiting straps is recommended to prevent over-extension of suspension components
• A new front CV driveshaft is recommended for front shocks with a maximum extended length greater than 29 inches

Rock Krawler suspension systems are designed, tested, and manufactured in the northeastern United States, drawing from real-world custom Jeep builds to refine every production kit that leaves their facility.