Rock Krawler F2XF4005 4.0in X-Factor Series Suspension System Lift Kit

The Rock Krawler F2XF4005 is a complete 4.0-inch X-Factor Series suspension lift system engineered for Ford Super Duty diesel trucks. Designed as a true bolt-in upgrade, this kit delivers measurable improvements in both on-highway ride quality and off-road performance without the handling compromises typically associated with lifted trucks. Every component is precision-engineered to work together as a cohesive system, optimizing factory suspension geometry while providing the lift height needed for larger tire fitment.

At the heart of the system is a 4-link conversion with fully adjustable telescoping arms, fabricated from 1/4-inch thick laser-cut steel with 1-3/8-inch shanks. These arms, combined with sport-tuned triple-rate front coil springs, eliminate the suspension bind common in conventional radius arm setups and deliver significantly improved axle articulation both on and off road. The rear of the system uses a custom 2-inch add-a-pack leaf spring setup, finitely engineered to complement the front coils and properly support the vehicle under all load conditions.

Key Features:

• Complete bolt-in suspension system — no cutting or welding required
• (4) Fully boxed adjustable telescoping 4-link arms — 1/4-inch thick laser-cut steel construction with 1-3/8-inch shank
• (1) 4-link bracket kit with 1/4-inch thick laser-cut steel mounting brackets
• (2) Sport-tuned triple-rate front coil springs for progressive, controlled ride quality
• (2) Adjustable, serviceable, and rebuildable front Pro Sway Bar Link assemblies
• (2) 2-inch add-a-pack rear springs
• (4) U-bolt assemblies
• (2) Front bump stop extensions
• (1) Front stainless steel brake line kit
• Provides a level stance for improved appearance and larger tire clearance
• Optional: (4) 2-5/8-inch Remote Reservoir Prodigy Shocks available separately

The X-Factor system's 4-link geometry corrects steering angles and suspension bind found in stock radius arm configurations, delivering superior axle control and articulation for trail use. Up front, the Pro Sway Bar Link assemblies are fully adjustable and rebuildable, ensuring long-term serviceability. Note: Shocks are not included but are available as an optional upgrade. This system is designed to provide a level stance that accommodates fitment of larger tires.