Rock Krawler JL35X2PNL-392S1 3.5" X Factor X2 Pro No Limits Long Arm Suspension System - 392 Stage 1

The Rock Krawler JL35X2PNL-392S1 is a 3.5-inch X Factor X2 Pro No Limits Long Arm Suspension System engineered specifically for the Wrangler JL 392 platform. This complete long arm system is purpose-built for serious rock crawling while delivering a balanced, functional lift on the street — tuned from the ground up to accommodate the weight and power of the 392 cubic inch V8 engine.

This system delivers 3.5 inches of lift over the factory 1-inch ride height using 392-specific Triple Rate Coil Springs rated for the added mass of the V8 drivetrain. All four coils are engineered with the correct free-length for off-road articulation and superior on-road ride quality compared to OEM linear rate springs.

Key Features:

• X Factor X2 Long Arm Architecture: Independent 3-link design front and rear for maximum articulation and off-road performance
• X2 Rear Suspension Geometry: Provides adjustable anti-squat with enhanced rear instant center and rear roll center for improved handling dynamics
• Pro No Limits Sway Bar Links: CNC machined billet aluminum center section with Made in USA FK Bearing heim joints — allows Rubicon owners to use the factory electronic sway bar disconnect for full, bind-free articulation off-road
• 392-Specific Triple Rate Coil Springs: Heavier spring rate calibrated for the V8 engine's added front weight, achieving a balanced ride height and lift
• High Clearance X2 Axle Brackets: Provide up to 4.5 inches of additional ground clearance under the rear axle compared to stock
• Adventure Series Maintenance-Free Joints: Located at frame connections on front and rear control arms — no greasing required, with excellent vibration absorption and proper joint misalignment capability off-road
• Stage 1 Shock Package: Includes matched front and rear shocks providing substantial front and rear axle travel
• Geometry Correction Pads: Included to reduce factory spring bow and improve coil spring seating
• Front and Rear Track Bar Corrections: Precisely centers both axles to maintain on-road handling with no compromise
• Heat Shield Thermal Barriers: OEM-style protection for front control arm joints at the frame mount

Installation Notes: This is a full long arm conversion requiring welding of front and rear long arm mounts, removal of OEM frame-side lower and upper control arm mounts (front and rear), removal of OEM axle-side rear lower control arm and track bar mounts, and modification/welding of raised rear upper shock mounts. A new front CV driveshaft is recommended for front shocks with a maximum extended length greater than 29 inches.

Rock Krawler backs their hard parts — including control arms, track bars, and brackets — with an abuse-proof lifetime guarantee. Joint housings carry a 10-year warranty and coil springs a 5-year warranty.