Rock Krawler 3.5" X-Factor X2 Flat-Belly Long-Arm Suspension System | Jeep Wrangler LJ (2004–2006)
Experience the next generation of suspension performance for your 2004–2006 Jeep Wrangler LJ with the Rock Krawler 3.5" X-Factor X2 Flat-Belly Long-Arm System. Designed to push the boundaries of off-road capability and on-road comfort, this system is built for Jeep owners who demand the best in articulation, ground clearance, and durability.
Born from the legendary Rock Krawler X-Factor design — the first system to combine a 3-link front and triangulated 4-link rear — the new X-Factor X2 takes things even further. Featuring double triangulation in the rear, this system delivers unparalleled axle control, articulation, and stability in the most extreme conditions.
At the core of the system is a full flat-belly design where every control arm tucks tightly inside the frame, maximizing clearance and protecting vital components. Combined with Adventure Series Joints and Pro-X Krawler Joints featuring 95°+ of misalignment capability, this system offers unmatched flexibility and requires minimal maintenance — all backed by a lifetime warranty.
Key Features & Benefits:
Maintenance-Free, High-Articulation Control Arms: Built with Rock Krawler's award-winning Adventure Series Joints for superior durability and zero maintenance.
Full Flat-Belly Long-Arm Design: All suspension arms tuck inside the frame for best-in-class ground clearance.
Best Cross Over Angles in the Industry: Reduces hang-ups and increases off-road breakover performance.
Best On-Road and Off-Road Geometry: Tuned for confident highway handling and unbeatable trail performance.
Excellent Highway Ride & Handling: Balanced ride feel thanks to tuned triple-rate springs and optimized geometry.
High Misalignment Lower Control Arms: 95°+ articulation with Pro-X Krawler Joints using advanced BASF thermo-elastomer materials.
Independent 3-Link Front Suspension: Improves steering precision and reduces front-end bind.
Double-Triangulated 4-Link Rear Suspension: Eliminates the need for a track bar, maximizing axle stability and flex.
Tuned Triple-Rate Coil Springs (Front & Rear): Perfect balance of ride quality, load carrying, and off-road compliance.
Pro Sway Bar Disconnects (Front): Quick-release design enhances articulation when off-road.
Upgrade Ready: Compatible with coilover conversions, stretch kits, and the Rockzilla system.
Lifetime Warranty: Abuse-proof coverage on all hard suspension parts for peace of mind.
System Includes:
(4) Triple-Rate Coil Springs
(4) High Misalignment/Adjustable Lower Control 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
(4) Lower Control Arm Axle Mounts
Shock Information:
All RRD Shocks And Coilovers Are Designed and Built In-house
Generic Front Shock Length – 16” Collapsed/ 25” Maximum Extended
Generic Rear Shock Length – 15.5” Collapsed/ 24.5” 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.
Recommend using rear shock relocation brackets or rear shock shifters for some applications.
Requires removal of the OEM rear upper control arm mounts off the rear axle.
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.
