Rock Krawler JL45X2PNL-4DTR 4.5" X-Factor X2 PRO No-Limits Long-Arm Trail Runner Suspension System

The Rock Krawler 4.5" X-Factor X2 PRO No-Limits Long-Arm Trail Runner Suspension System is a top-tier long-arm lift kit engineered for hardcore rock crawling and serious off-road performance. Built for the Jeep Wrangler JL diesel platform, this Trail Runner system delivers a full coilover setup front and rear for maximum tunability on the street and the trail.

The "PRO" designation signifies the inclusion of billet aluminum CNC-machined lower control arms — custom machined in-house from solid square billet stock and engineered to withstand the most extreme trail abuse. The "No-Limits" designation comes from the inclusion of front sway bar links specifically designed for compatibility with the factory electronic sway bar disconnect found on Rubicon models, complete with factory-sized hardware, a CNC machined billet aluminum center section, and Made-in-USA FK bearing heim joints.

Key Features:

• 4.5" lift with high clearance long-arm geometry for increased ground clearance and large tire fitment
• Independent 3-link design front and rear for maximum articulation and off-road performance
• Trail Runner coilover setup — front and rear coilovers for an added level of ride and handling tunability
• Double-adjustable upper control arms front and rear, upsizing factory hardware to 14mm with 2-3/8" mounting width and 1" Pro Krawler joints at each end
• Chromoly solid steel control arms built to carry all suspension forces
• X2 rear suspension geometry with adjustable anti-squat, enhanced rear instant center, and improved rear roll center for superior stability
• Adventure Series maintenance-free joints at frame connections to reduce grease points and provide excellent vibration absorption and joint misalignment capability off-road
• High clearance axle mounts delivering 4.5" of added ground clearance under the rear axle versus stock
• Heat shield thermal barriers to protect front control arm joints at the frame — just like OEM
• Track bar geometry correction front and rear to properly center axles and maintain on-road handling
• Diesel-specific tuning and components for JL Wrangler 4-cylinder diesel drivetrain

Rock Krawler designs and manufactures all of their suspension systems in the USA, applying lessons learned from custom one-off builds directly into their production products. All Rock Krawler hard parts — including control arms, track bars, and brackets — are backed by a lifetime abuse-proof warranty, with joint housings covered for 10 years and coil springs for 5 years.