2023-2025 Superduty 4" Coil Spring Lift Kit w/ Falcon 2.1 Shocks (63-23440)

The ReadyLIFT 4-inch Coil Spring Suspension System is a comprehensive lift kit that includes vehicle-specific, performance-tuned Falcon 2.1 shocks on all four corners. Designed to improve stance, performance, and capability, this bolt-on system is engineered to deliver a better-than-factory feel, making it ideal for daily driving, off-road excursions, and tow/haul duties. It includes all necessary components to clear larger wheels and tires while maintaining optimal Super Duty driving dynamics.

Features

• 4-inch Coil Spring Lift Kit with Vehicle-specific performance-tuned Falcon Shocks.
• Falcon 2.1 monotube dampers on all four corners, with rear shocks featuring adjustable 3-position tuning for daily, sport, or work duties.
• Includes Radius Arm Drops for correct caster angle.
• Bolt-on lift kit - no structural modifications required.
• Engineered to improve dynamic roll control and low-speed damping.
• Provides dramatic improvement in on-road comfort and off-road performance.
• Optimized fitment for unobstructed suspension travel and articulation.

Notes

• Tremor versions will not gain the full 4 inches over stock ride height.
• Trucks equipped with the "Onboard Scale" option will require the Auto-Leveling Headlight Bracket (PN 67-23410).
• New auto headlight brackets are only compatible with stock radius Arms.

Compatibility Notes

• Kits designed for diesel applications only (Power Stroke 4WD).
• Not recommended for 2WD or gas trucks.
• Works for trucks with rear single-wheel only.
• Single Cab configuration has not been validated for fitment and drivability.

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 Piggyback Rear Shocks
• Kit Contents: 4-inch Lift Springs, Falcon 2.1 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.