2017-2022 Superduty 4" Coil Spring Lift Kit w/ Falcon 2.1 Shocks (63-27440)

The ReadyLIFT 4-inch Coil Spring Suspension System is a comprehensive lift kit designed to improve the stance, performance, and capability of the truck, including front and rear Falcon 2.1 shocks. This performance-enhancing kit features specially engineered coil springs and vehicle-specific performance-tuned Falcon 2.1 dampers on all four corners to provide a better-than-factory feel for daily driving, off-road excursions, and tow/haul duties. It is a bolt-on system that allows for increased tire sizes and widths while improving ground clearance.

Features

• 4-inch Coil Spring Lift Kit with Vehicle-specific performance-tuned Falcon Shocks.
• Falcon 2.1 monotube dampers on all four corners.
• Rear adjustable 3-position Falcon 2.1 shocks tune for daily, sport, or work duties.
• Improved dynamic roll control and low-speed damping.
• Dramatic improvement in on-road comfort and off-road performance.
• Radius Arm Drops for correct caster angle.
• Bolt-on lift kit - no structural modifications required.

Notes

• Tremor versions will not gain the full 4 inches over stock ride height.
• New auto headlight brackets are only for stock radius Arms.

Compatibility Notes

• Kits designed for diesel applications only.
• Not recommended for 2WD or gas trucks.
• Single Cab configuration has not been validated for fitment and drivability.
• Works for trucks with rear single-wheel only.
• Compatible with air bags as long as they mount to the leaf spring and not the bump stop tang.

Tire Fitment

• Allows for up to 37-inch tall tires on 9-inch wide wheels with +18 offset.
• Recommended tire size is 37 inches by 12.5 inches.
• Recommended wheel: 17 inches and up x 9 inches wide, +25 offset / 6 inches backspacing (minor trimming of the front valance may be necessary).

Specs

• Front Lift: 4.0 inches
• Shock Type: Falcon 2.1 Monotube Front and Rear Shocks
• Kit Contents: 4-inch Lift Springs, Falcon 2.1 Monotube Front and Rear Shocks, Track Bar Relocation Bracket, Radius Arm Drops, Sway Bar Drops, Bump Stop Extensions, Carrier Bearing Drop, Front Brake Line Brackets, Fabricated Rear Lift Blocks, and a Hardware Pack.