Rock Krawler JK45X2LA-2CS 4.5" X-Factor X2 Long-Arm Suspension System with RRD 2.625" RR Coilover Shocks
Drastic Improvement in Ride Quality: The flatter control arm angles significantly reduce the amount of road vibration and "harshness" transferred to the cabin, making long drives to the trailhead far more comfortable.
Extreme Suspension Articulation: The long-arm architecture allows for incredible vertical wheel travel and axle "droop" without the binding or steep angles found in shorter systems, keeping your tires planted on the most uneven terrain.
Anti-Squat & Geometry Correction: The X2 system is engineered to optimize the vehicle's "Instant Center," which minimizes front-end dive during braking and rear-end squat during acceleration, providing a planted feel both on and off-road.
Indestructible Hard Parts: Featuring Rock Krawler’s signature solid steel adjustable arms and high-clearance designs, this system is built to take direct hits from rocks while protecting your drivetrain and maintaining perfect alignment.
Pro Flex & Adventure Series Joints: These joints provide the best of both worlds—massive degrees of misalignment for the trail and a quiet, vibration-dampening ride for the street, all while being rebuildable and exceptionally durable.
Many states have laws that limit the maximum height of a lifted vehicle. Never exceed the legal height limit.
For the ultimate Jeep Wrangler JK transformation, the Rock Krawler 4.5" X-Factor X2 Long-Arm Suspension System represents the pinnacle of off-road engineering. While mid-arm kits improve upon the factory setup, this "X2" Long-Arm system completely reimagines the suspension's mounting points to drastically improve the control arm's swing radius. By moving the frame-side mounts further back, the arms operate at a much flatter angle. This translates to a ride quality that is often smoother than a stock Jeep, as road impacts are directed into the springs rather than through the control arms into the chassis. It is the definitive choice for enthusiasts who demand a "trail-ready, highway-refined" vehicle that can handle the most technical rock crawling trails in the country.
The X2 system is built around Rock Krawler’s massive, solid steel long arms and heavy-duty crossmembers, providing a rigid foundation that strengthens the JK's frame. This setup isn't just about height; it’s about suspension geometry optimization. By minimizing caster change throughout the suspension's cycle, the X-Factor X2 eliminates the "rear-steer" effect and provides a level of stability and predictable handling that short or mid-arm kits simply cannot achieve at a 4.5" lift height. If your goal is to build a top-tier JK that handles 37" to 40" tires with surgical precision, this is the final word in suspension technology.
- (2) Front Frame Side Weld-on Long-arm Mount
- (2) Heat Shield Products Thermal Barrier
- (1) Top Mount PRO-X Drag Link
- (1) 1/4” Thick Laser Cut Steel Cross Member
- (2) Front High Clearance Adjustable Lower Control Arm
- (1) Front Axle Side Weld-on Control Arm Bracket
- (1) Front Adjustable Upper Control Arm
- (1) Front Adjustable Anti-wobble Track Bar
- (1) Front Sway Bar Disconnect Kit
- (4) Front/Rear Triple-rate Coil Spring
- (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) Front/Rear Extended Brake line Kit
Jeep Wrangler 2-Door (JK)
- 2018 Jeep Wrangler 2-Door (JK)
- 2017 Jeep Wrangler 2-Door (JK)
- 2016 Jeep Wrangler 2-Door (JK)
- 2015 Jeep Wrangler 2-Door (JK)
- 2014 Jeep Wrangler 2-Door (JK)
- 2013 Jeep Wrangler 2-Door (JK)
- 2012 Jeep Wrangler 2-Door (JK)
- 2011 Jeep Wrangler 2-Door (JK)
- 2010 Jeep Wrangler 2-Door (JK)
- 2009 Jeep Wrangler 2-Door (JK)
- 2008 Jeep Wrangler 2-Door (JK)
- 2007 Jeep Wrangler 2-Door (JK)
Jeep Wrangler Unlimited 4-Door (JK)
- 2018 Jeep Wrangler Unlimited 4-Door (JK)
- 2017 Jeep Wrangler Unlimited 4-Door (JK)
- 2016 Jeep Wrangler Unlimited 4-Door (JK)
- 2015 Jeep Wrangler Unlimited 4-Door (JK)
- 2014 Jeep Wrangler Unlimited 4-Door (JK)
- 2013 Jeep Wrangler Unlimited 4-Door (JK)
- 2012 Jeep Wrangler Unlimited 4-Door (JK)
- 2011 Jeep Wrangler Unlimited 4-Door (JK)
- 2010 Jeep Wrangler Unlimited 4-Door (JK)
- 2009 Jeep Wrangler Unlimited 4-Door (JK)
- 2008 Jeep Wrangler Unlimited 4-Door (JK)
- 2007 Jeep Wrangler Unlimited 4-Door (JK)
Rock Krawler 4.5" X-Factor X2 Long-Arm Suspension System Options
| Part Number | Catalog # | Model Option | Shock Option | Price | |||||
|---|---|---|---|---|---|---|---|---|---|
| 16189-4867 | 2-Door JK | without Shocks | $5,160.95 | ||||||
| 16189-4868 | 2-Door JK | with RRD 2.25" IFP Shocks | $6,422.41 | ||||||
| 16189-4869 | 2-Door JK | with RRD 2.625" RR Coilover Shocks | $9,576.04 | ||||||
| 16189-4882 | 4-Door JK | without Shocks | $5,267.10 | ||||||
| 16189-4873 | 4-Door JK | with RRD 2.25" IFP Shocks | $6,479.41 | ||||||
| 16189-4874 | 4-Door JK | with RRD 2.625" RR Coilover Shocks | $9,293.24 |
- Shared By Others
- Share a Photo
- Ask a Question
- Write a Review