6 Inch Lift Kit | Rear Blocks | M1 | Ford F-250/F-350 Super Duty 4WD (99-04)

Transform your 1999-2004 Ford F-250/F-350 Super Duty 4WD with Rough Country’s 6" suspension lift kit — a front-to-back upgrade designed to deliver a level stance, aggressive presence, and real-world off-road capability without compromising everyday driving comfort.

Key features that set this kit apart:

• Front lift with leaf springs provides meaningful height gain while preserving ride quality and towing performance, so your daily drive remains smooth even when you’re cruising on highways.
• Sway bar drop brackets and a track bar bracket keep proper angles after lifting, delivering a factory-like steering feel and stable handling at higher elevations.
• Premium N3 shocks — 10-stage variable, high-pressure nitrogen-charged dampers tuned for a balanced ride: capable off-road action paired with confident highway comfort.
• 54mm shock bodies with an 18mm spring-loaded piston rod for durability and faster cooling under demanding conditions, so performance lasts longer on rough terrain.
• Designed to fit up to 37" tires with proper wheel backspacing, giving you the room to choose a bold, rugged look without rubbing or compromised steering.
• Lifetime replacement warranty provides long-term peace of mind, reflecting Rough Country’s confidence in the kit’s durability and performance.

Why this kit is the smarter choice for 99-04 Ford Super Duty owners: it’s not just about higher ride height; it’s about preserving and enhancing type-specific performance. The engineered balance between front lift, rear compatibility, and precise geometry means you gain ground clearance and a commanding stance without sacrificing ride quality, stability, or steering feedback. This is ideal for drivers who value a ready-for-anything truck that still handles confidently on daily commutes and long highway trips.

Who should consider this lift kit? Off-road enthusiasts, weekend warriors, and work-truck owners who want to tackle rough trails, rocky terrain, or uneven backroads with a leveled, confident ride. It’s also a great upgrade for anyone looking to fit larger tires for better traction and a more aggressive look while maintaining predictable on-road behavior.

Practical tips for getting the most from your install:

• Plan a professional alignment after installation to ensure optimum tire wear and steering accuracy.
• Verify wheel backspacing to accommodate up to 37" tires and prevent rubbing at full lock or during articulation.
• Follow the installation instructions for torque specs and component seating to maximize longevity and performance.