Rock Krawler 4.5" X-Factor X2 Long-Arm Flat-Belly 4" Stretch Suspension System | Jeep Wrangler LJ (2004–2006)
Take your 2004–2006 Jeep Wrangler LJ to the next level with the Rock Krawler 4.5" X-Factor X2 Flat-Belly 4" Stretch Long-Arm Suspension System — the most advanced LJ suspension kit on the market.
This next-generation system adds 4 inches of rear stretch via extended upper and lower control arms, dramatically improving departure angle, wheelbase stability, and traction over rough terrain. It's the only full flat-belly long-arm system available, designed to tuck all suspension components up inside the frame for maximum ground clearance and rock-crawling capability.
The patented X-Factor X2 suspension geometry builds on the legendary original with enhanced double triangulation in the rear and a front independent 3-link design, setting a new bar for articulation, strength, and ride control.
Key Features & Benefits:
Maintenance-Free, High-Articulation Control Arms: Featuring our award-winning Adventure Series Joints for quiet, long-lasting performance with zero maintenance.
4" Rear Stretch = 98" Wheelbase: Improves departure angle, climbing stability, and handling.
Full Flat-Belly Long-Arm System: All arms tucked up inside the frame for maximum ground clearance.
Industry-Leading Cross Over Angles: Optimized suspension geometry delivers better breakover clearance than any other long-arm system.
Best-In-Class On-Road & Off-Road Geometry: Tuned for excellent street manners and aggressive off-road articulation.
Exceptional Highway Ride & Handling: Triple-rate coil springs and advanced geometry provide a smooth and predictable ride at speed.
High Misalignment Lower Control Arms: Maximize axle articulation and suspension travel without binding.
Tuned Triple-Rate Coil Springs (Front & Rear): Provides ideal balance between ride comfort, articulation, and load handling.
Independent Front 3-Link Geometry: Delivers controlled, responsive steering with reduced bump steer.
Double-Triangulated Rear 4-Link Geometry: Eliminates the need for a rear track bar and improves axle stability under load.
Pro Front Sway Bar Disconnects: Quickly disconnect your sway bar for improved off-road articulation.
Upgrade-Ready: Compatible with coilovers, Rockzilla suspension, and stretch configurations for future performance mods.
Abuse-Proof Lifetime Warranty: Backed by Rock Krawler’s industry-leading guarantee on all hard parts.
System Includes:
(4) Triple-rate Coil Springs
(4) High Misalignment/Adjustable Lower long-arms
(1) Adjustable Front Upper Control Arm
(1) High Misalignment/Adjustable Front Track Bar
(2) Front Adjustable Sway Bar Disconnects
(2) Front Sway Bar Link Straps
(1) Skid Plate And Skid Plate Mounting Brackets
(2) Rear Upper Triangulated 4 Link Arms
(1) Rear Triangulated 4 Link Mounting Cradle/Axle Truss
(3) Extended Stainless Steel Brake Lines
(2) Extended Rear Sway Bar Links
(1) Front Track Bar Relocation Bracket
(1) Drop Pitman Arm
(2) Rear Coil Spring Mounts With Integrated Bump Stops
(2) Rear Upper Shock Mounts
Shock Information:
All RRD Shocks And Coilovers Are Designed and Built In-house
Generic Front Shock Length – 17” Collapsed/ 27” Maximum Extended
Generic Rear Shock Length – 16” Collapsed/ 26” Maximum Extended
Bilstein 5100 Shocks
A Great Pairing With Our Multi-rate Coil Springs
Maintenance Free
Front Part Number: RRD04061-B51
Rear Part Number: RRD04066-B51
Wheel & Tire Fitment:
Typical wheel fitment for a 12.5" wide tire on a 8” to 9” wide wheel with 3.75" of backspacing or less for stock axle applications.
General Notes:
Highly Recommend Antirock Rear Sway Bar
Designed for OEM axles and OEM axle control arm mounting widths (Dana 30/44). For use with axles that will not be able to achieve OEM lower control arm mounting widths please call as it will require customized lower control arm bend profiles similar to how we do Rockzilla Systems and Upgrades.
Requires a SYE with C.V. Driveshaft, with long rear uppers, a custom cat back exhaust is required.
Requires removal of the OEM rear upper control arm mounts off the rear axle.
Recommend using rear shock relocation brackets or rear shock shifters for some applications.
Requires SAVVY or Motobilt HD Body Mounts that raise the body 1.25” and a small motor mount lift or 1.5” Body Lift/Motor Mount Lift or Greater.
Remember to combine suspension lift height and body lift height or body mount replacement and your total lift height to achieve your desired overall all tire clearance.
