2017-2022 Superduty 4" Coil Spring Lift Kit Falcon 1.1 Monotube Shocks (49-27421)

The ReadyLIFT 4-inch Coil Spring Lift Kit for 2017-2022 Ford Super Duty Diesel trucks is a premium suspension system designed to provide the perfect balance of height and performance. This kit replaces the factory radius arms with heavy-duty tubular radius arms that are formed inward to allow for maximum tire clearance while correcting caster angles for better steering feel. Paired with Falcon 1.1 Monotube shocks and a dual steering stabilizer, this system delivers a smooth, controlled ride that is specifically tuned for the weight and power of the 6.7L Power Stroke diesel engine.

Features

• Heavy-duty tubular radius arms correct caster geometry and provide extra clearance for larger tires.
• Falcon 1.1 Monotube performance shocks offer superior damping and roll control for a better than factory ride.
• Falcon dual steering stabilizer reduces bump steer and improves front-end stability with aggressive tire packages.
• Front track bar relocation bracket maintains proper axle alignment for precise steering response.
• Engineered front coil springs are specifically tuned for diesel engines to provide 4 inches of lift without sagging.
• Sway bar drop brackets and bump stop extensions preserve factory suspension travel and geometry.
• Fabricated steel rear lift blocks provide a leveled stance while maintaining the trucks original towing capacity.
• Carrier bearing drop bracket is included to optimize driveline angles and prevent vibration.

Notes

• Single Cab configurations have not been validated for fitment or drivability with this system.
• Vehicle alignment and headlamp aim must be adjusted following the installation to ensure safety.
• The use of the factory wheels with oversized tires may require minor trimming of the inner fender liner.
• Estimated installation time is approximately 6 to 7 hours excluding wheel and tire assembly.

Compatibility Notes

• Fits 2017 to 2022 Ford Super Duty F250 and F350 4WD Diesel trucks.
• Specifically designed for Single Rear Wheel (SRW) models.
• Not compatible with 2WD or gasoline powered trucks.
• Tremor models will gain less than the stated 4 inches of lift over their factory height.

Tire Fitment

• Maximum Tire Diameter: 37 inches.
• Recommended Setup: 37x12.50 tires on a 9 inch wide wheel with a +25 offset (6 inch backspacing).
• Minor trimming of the front valance may be necessary for full clearance with certain 37 inch tire brands.

Shock Specs

• Shock Type: Falcon 1.1 Monotube series performance dampers.
• Construction: 2.125 inch 6061-T6 aluminum alloy shock bodies for high impact resistance and heat dissipation.
• Internal Technology: Features Volume Optimized Damping (VOD) with a digressive linear piston for improved control.
• Fluid: Uses Red Line high VI shock oil for consistent performance in extreme temperature ranges.

Specs

• Front Lift Height: 4 inches.
• Radius Arm Type: Heavy duty Tubular Steel.
• Kit Contents: 4 inch Front Springs, Four Falcon 1.1 Shocks, Tubular Radius Arms, Dual Steering Stabilizer, Track Bar Relocation Bracket, Sway Bar Drops, Bump Stop Extensions, Carrier Bearing Drop, Brake Line Brackets, and Fabricated Rear Blocks.