🔥 Rough Country 49240 6-Inch N3 Suspension Upgrade Radius Arm Lift Kit for Ford F-250 / F-350 Super Duty 4WD (1999)
If you want aggressive height with dependable daily performance, this configuration delivers. The Rough Country 49240 lift kit is engineered specifically for the 1999 Ford F-250 and F-350 Super Duty 4WD platform. It provides six inches of suspension lift using a heavy-duty radius arm drop system paired with N3 nitrogen-charged shocks.
The 1999 model year marked the launch of the modern Super Duty chassis. That platform features a solid front axle with coil springs and radius arms. Lifting this suspension requires precise geometry correction to maintain proper steering angles.
This Lift Kit is ideal for owners restoring or upgrading early Super Duty trucks.
🚙 Vehicle Compatibility
Designed specifically for:
Not compatible with 2WD models.
Fits trucks equipped with the factory solid front axle and coil spring suspension.
Always verify drivetrain configuration before installation.
🆚 What Makes the 49240 Configuration Different?
The 49240 configuration includes N3 nitrogen-charged twin-tube shocks. That separates it from base shock options.
This system typically includes:
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Heavy-duty front crossmembers
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Radius arm drop brackets
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Lifted front coil springs
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Rear lift blocks
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N3 nitrogen-charged shock absorbers
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Track bar relocation bracket
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Brake line relocation components
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Differential drop hardware
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Sway bar relocation brackets
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High-strength installation hardware
This setup restores proper caster and driveline angles after lifting.
This Lift Kit focuses on reliable geometry correction with balanced shock performance.
💪 Radius Arm Geometry Correction
The 1999 Super Duty uses a coil spring solid front axle supported by radius arms.
When lifting six inches, drop brackets reposition those arms. That restores factory alignment specifications.
Benefits include:
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Improved steering stability
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Reduced front-end wander
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Proper driveline alignment
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Predictable highway handling
Correct suspension geometry protects steering components and reduces wear.
This design maintains the strength of the original axle layout.
🎯 N3 Shock Performance
N3 shocks are nitrogen-charged twin-tube dampers tuned for lifted trucks.
Advantages include:
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Smooth daily ride quality
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Balanced compression and rebound control
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Improved stability over factory shocks
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Reliable performance under load
While not monotube or adjustable, they are calibrated for lifted Super Duty applications.
They provide comfortable handling for daily driving and moderate trail use.
This configuration is well-suited for work trucks and weekend builds.
🌄 Six Inches of Height and Aggressive Stance
Six inches of suspension lift dramatically transforms the 1999 Super Duty.
Increased ride height improves approach and departure angles.
Many owners pair this upgrade with 35-inch tires and proper wheel offset. Always confirm clearance before installation.
The truck gains improved undercarriage protection and commanding presence.
This Lift Kit enhances both capability and appearance.
🚛 Towing and Heavy-Duty Applications
The 1999 Super Duty platform is known for towing durability.
Corrected radius arm geometry helps maintain axle alignment while hauling.
Rear lift blocks help preserve factory rake for trailer balance.
N3 shocks improve rear-end control when carrying heavy loads.
This suspension upgrade supports commercial and recreational use.
🛠 Installation Overview
Professional installation is recommended.
The system bolts to factory mounting points using supplied hardware.
Minor trimming may be required depending on wheel and tire size.
A complete wheel alignment is mandatory after installation.
Proper setup ensures safe handling and long-term reliability.
🔩 Built for Strength and Durability
Powder-coated steel components resist corrosion and harsh environments.
Heavy-duty crossmembers reinforce suspension mounting areas.
High-grade hardware secures components under stress.
N3 shocks are engineered for dependable long-term performance.
This suspension system is built to handle heavy-duty demands.
🚀 Why Choose the 49240 Suspension System?
This configuration is ideal if you want:
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Proven radius arm geometry correction
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Balanced N3 shock performance
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Larger tire clearance
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Stable towing capability
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Aggressive six-inch ride height
It delivers structural suspension improvement for the first-generation Super Duty platform.
This Lift Kit provides engineered height and dependable performance for the 1999 model year.
🔗 Explore More Suspension Options
Looking for additional heavy-duty suspension upgrades?
Lift kits collection
Protect your upgraded truck with professional window services.
Car window tinting
📞 Need Expert Assistance?
Have questions about compatibility or configuration differences? Contact Audio Jam at (302) 832-2868. Our team can help you choose the right suspension setup.
❓ Frequently Asked Questions
1. Will this Lift Kits fit my 1999 Ford F-350 Super Duty 4WD?
Yes. This Lift Kits is designed specifically for 1999 F-250 and F-350 Super Duty 4WD models.
2. What makes this Lift Kits different from the 4-Link version?
This Lift Kits uses radius arm drop brackets instead of a full 4-Link suspension conversion.
3. Can this Lift Kits support towing and heavy loads?
Yes. This Lift Kits maintains corrected suspension geometry for stable towing performance.
