Rock Krawler JK45XF-4 4.5" X-Factor Mid-Arm Suspension System without Shocks for 07-18 Jeep Wrangler JK Unlimitd 4-Door
Superior On-Road Handling: Unlike basic lift kits, the X-Factor system includes 8 adjustable control arms that allow you to perfectly dial in your pinion angles and caster, resulting in a stable, predictable drive at highway speeds.
Unmatched Durability: The control arms are constructed from heavy-duty solid steel and feature Pro Flex Joints, which are maintenance-free, quiet, and allow for massive amounts of suspension flex without binding.
High-Clearance Design: The rear lower control arms are specifically "bent" or offset to provide additional ground clearance, allowing you to slide over obstacles that would snag standard straight arms.
Correction of Suspension Geometry: By including an adjustable front track bar made of solid alloy steel and a rear track bar relocation bracket, the system ensures your axles stay perfectly centered under the frame, preventing "crab-walking" and uneven tire wear.
Triple-Rate Coil Springs: These specialized springs provide a soft initial rate for small bumps and a firmer rate for heavy impacts, ensuring your JK remains level and comfortable regardless of the terrain or load.
Many states have laws that limit the maximum height of a lifted vehicle. Never exceed the legal height limit.
The Rock Krawler 4.5" X-Factor Mid-Arm Suspension System is the gold standard for Jeep Wrangler JK owners who refuse to compromise between highway manners and elite trail performance. Engineered for those looking to run 37-inch or even 40-inch tires, this system completely reconfigures your Jeep’s geometry to eliminate the "flighty" steering often associated with high-lift heights. By utilizing heavy-duty, adjustable control arms and high-clearance trailing arms, the X-Factor kit provides incredible articulation while maintaining a centered axle and perfect caster. Whether you’re crawling through the Rubicon or commuting to work, the triple-rate coil springs ensure a plush ride that doesn't sag under the weight of heavy aftermarket bumpers or winches.
Investing in this mid-arm system means upgrading your Jeep’s DNA with components built for extreme durability and precision. Rock Krawler’s legendary "No Fine Print" lifetime warranty on all hard parts offers peace of mind that few other manufacturers can match. The kit focuses on maximizing ground clearance and wheel travel, making it an essential foundation for any serious off-road build.
- (4) Triple-rate Coil Springs
- (2) Front High Clearance Adjustable Lower Control Arms
- (2) Front Adjustable Upper Control Arms
- (1) Adjustable Front Track Bar
- (1) PRO-X Top Mount Drag Link
- (2) Quick Disconnect Front Sway Bar Links
- (2) Rear High Clearance Adjustable Lower Control Arms
- (2) Rear Adjustable Upper Control Arms
- (2) Rear Spring Pads
- (2) Adjustable Rear Sway Bar Links
- (1) Bolt-on Rear Track Bar Relocation Bracket
- (1) Rear Track Bar
- (1) Front and 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 Mid-Arm Suspension System Options
| Part Number | Catalog # | Model Option | Shock Option | Price | |||||
|---|---|---|---|---|---|---|---|---|---|
| 16189-4859 | 2-Door JK | without Shocks | $3,238.42 | ||||||
| 16189-4860 | 2-Door JK | with RRD 2.25" IFP Shocks | $4,499.88 | ||||||
| 16189-4861 | 4-Door | without Shocks | $3,295.42 | ||||||
| 16189-4862 | 4-Door | with RRD 2.25" IFP Shocks | $4,556.88 |
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