Rock Krawler F2AS4005 4.0in Adventure Series Suspension System 4-Inch Lift Kit

The Rock Krawler F2AS4005 4.0-Inch Adventure Series Suspension System is a complete lift kit engineered to dramatically improve both on-road ride quality and off-road capability. Unlike conventional lift kits that compromise handling, this system is purpose-built to actually improve the overall ride and handling characteristics of your diesel Super Duty truck.

The Adventure Series delivers approximately 3 inches of front lift and 2 inches of rear lift for a clean, level stance. Custom-wound front coil springs provide the altitude while simultaneously delivering a noticeable increase in ride comfort over stock. The system reuses the factory radius arm design but repositions them to maintain proper steering geometry at the new ride height.

Key Features:

• 4.0-inch lift with approximately 3-inch front / 2-inch rear lift distribution for a level stance
• Custom-wound front coil springs engineered for improved ride comfort and proper lift height
• Reuses factory radius arm design — relocated for correct steering and caster geometry
• Suspension tuned for 17-inch and 18-inch wheels and tires
• Designed for use with 40–45 PSI front / 30–40 PSI rear tire pressure (no payload)
• Bolt-on installation with all necessary hardware included
• Shocks sold separately — compatible with a wide range of aftermarket shock options
• 100% service-free Adventure Series joints for long-term durability

The Rock Krawler Adventure Series is the ideal upgrade for diesel Super Duty owners who want real-world performance improvements on the street and the trail. Engineered and built by Rock Krawler Suspension, a company 100% dedicated to precision suspension design for trucks and off-road vehicles.