6" 2023-2026 Ford F250 / F350 Super Duty 4WD Coilover Conversion Lift Kit by Rough Country

400258 and 400259 Rough Country 6-inch Coilover Conversion Lift Kits are designed for Ford F-250 and F-350 Super Duty trucks, delivering increased ground clearance, aggressive styling, and premium suspension performance for both on-road driving and demanding off-road use. Engineered to accommodate up to 37-inch tires, these systems eliminate factory rake while maintaining smooth ride quality, stable handling, and everyday drivability.

At the center of these systems are fully adjustable Vertex coilovers featuring a 2.5-inch nitrogen-charged monotube design with external reservoirs. The remote reservoirs provide significantly greater fluid capacity, improving cooling and consistent damping performance under heavy loads, on rough terrain, and during extended off-road driving. A secondary V2 front monotube shock is included at each front corner, creating a dual-shock setup that enhances suspension control, ride stability, and steering response across a wide range of driving conditions.

Built for strength and long-term durability, these coilover conversion systems feature heavy-duty fabricated 1/4-inch coilover mounts along with radius arm drop brackets designed to properly correct caster geometry and maintain factory-like handling characteristics. In the rear, heavy-duty fabricated lift blocks offer superior durability compared to cast alternatives, while an integrated anti-axle-wrap design helps minimize unwanted axle movement and preserve ride quality during towing, hauling, and off-road use.

Designed as a straightforward bolt-on suspension upgrade with no cutting or drilling required, these Rough Country 6-inch lift kits feature top-mounted reservoir brackets for secure reservoir placement and a front-to-rear leveling design for a balanced, aggressive stance. Choose from V2 or Vertex rear shocks for complete four-corner suspension performance, these systems deliver the ride quality, control, and capability expected from a premium Super Duty coilover suspension upgrade.

Features and Benefits:

• 400258 and 400259 Rough Country 6-inch coilover conversion lift kits for Ford F-250 and F-350 Super Duty
• Provides clearance for up to 37-inch tires
• Fully adjustable Vertex 2.5-inch remote reservoir coilovers
• Remote reservoirs improve cooling and damping consistency
• Secondary V2 front monotube shocks improve stability and steering control
• Heavy-duty fabricated 1/4-inch coilover mounts for increased durability
• Radius arm drop brackets correct caster geometry and preserve handling
• Heavy-duty fabricated rear lift blocks offer superior strength over cast blocks
• Anti-axle wrap rear blocks improve ride quality and axle stability
• Front-to-rear leveling design eliminates factory rake
• Top-mounted reservoir brackets provide a clean and secure installation
• 100% bolt-on installation with no cutting or drilling required
• Choose from V2 or Vertex rear shocks
• Improves off-road capability while maintaining predictable on-road handling
• Backed by Rough Country's limited lifetime replacement warranty