4" ReadyLIFT Suspension BIG Lift Kit | COIL SPRING SUSPENSION SYSTEM WITH FALCON 2.1 SHOCKS (Ford Super Duty Diesel 2023-2024)

After you complete your purchase, one of our experts will contact you to verify proper fitment.
The vehicle information you provided will be saved.

*All other brand lift kits are available.

ITEM# RLF248

MFG# 63-23440

• Fits 2023-UP Ford Super Duty Power Stroke 4WD.✔
• 4" Coil Spring Suspension System✔
• Vehicle-specific performance-tuned Falcon 2.1 monotube dampers on all four corners.✔
• Rear adjustable 3-position Falcon 2.1 shocks tune for daily, sport, or work duties.✔
• Radius Arm Drops for correct caster angle in kit.✔
• Bolt-on lift kit - no structural modifications required.✔
• Allows for up to 37" tall tires on 9" wide wheels with +18 offset.✔
• Diesel trucks with rear single-wheel only.✔
• ***Trucks equipped with the "Onboard Scale" option will require the Auto-Leveling Headlight Bracket.***✔
• PN: 67-23410 - Ford Super Duty Auto-Leveling Headlight 3.5''-6'' Lift Bracket Kit✔
• Note: Tremor versions will NOT gain the full 4 inches over stock ride height. NOT recommended for 2WD or gas trucks. Single Cab configuration has NOT been validated for fitment & drivability by ReadyLIFT. New auto headlight brackets are ONLY for stock radius Arms. ✔

ReadyLIFT Suspension is pleased to announce A new Super Duty Suspension System. We are now shipping ReadyLIFT's 4" Coil Spring Lift Kit, #63-23440, fitting 2023-2024 Ford Super Duty F250/F350 4WD Power Stroke® trucks. The new 4" lifts include front and rear Falcon 2.1 Falcon shocks. This kit is designed to improve stance, performance, and capability and includes everything necessary to clear larger wheels and tires. With vehicle-specific performance-tuned Falcon 2.1 dampers on all four corners, these lift kits provide a better-than-factory feel. Falcon Performance Shocks improve performance and comfort regardless of the terrain. The versatility of these systems makes them ideal for daily driving, off-road excursions, and tow/haul duties. This gives Super Duty owners an excellent alternative for lifting their trucks to fit larger tires. The coil spring system allows for increased tire sizes and widths along with providing improved ground clearance on a head-turning stance! Many consider this lift height the 'sweet spot' for Super Duty driving dynamics and maximum tire size while maintaining everyday usefulness.

This optimum lift height allows for up to 37" tall tires. The coil spring kit delivers a great ride and handling performance! The key ingredients to improving Super Duty ride and handling are the new, specially engineered coil springs teamed with Falcon 2.1 shocks and a track bar relocation bracket! This combination is more than just a lift kit, this is a performance and ride-enhancing kit that will really delight consumers with how well it rides and performs both on and off-road.

Features & Benefits:
· 4" Coil Spring Lift Kit with Vehicle-specific performance-tuned Falcon Shocks.
· Radius Arm Drops for correct caster angle
· Bolt-on lift kit - no structural modifications required.
· Allows for up to 37" tall tires on 9" wide wheels with +18 offset.
· Diesel trucks with rear single-wheel only.
· Falcon 2.1 monotube dampers on all four corners.
o Improved dynamic roll control and low-speed damping.
o Dramatic improvement in on-road comfort and off-road performance.
o Optimized fitment for unobstructed suspension travel and articulation.
o "High-Value Performance" is the driving force behind ReadyLIFT's new vehicle-specific Falcon shocks.
o Falcon shock absorber systems are tuned for comfort with predictive handling, control, and stability on-road and off-road.
o Rear adjustable 3-position Falcon 2.1 shocks tune for daily, sport, or work duties.


NOTE: Tremor versions will not gain the full 4 inches over stock ride height. Kits designed for diesel applications only. Not recommended for 2WD or gas trucks. Single Cab configuration has not been validated for fitment & drivability by ReadyLIFT.

Recommended tire size: 37" - 12.5"

Recommended wheel: 17" and up x 9" wide, +25 offset / 6" backspacing (minor trimming of the front valance may be necessary)

Tire Size Note: ReadyLIFT wheel and tire fitment recommendations are typically based on Wheel Pros wheels and Nitto tires. Due to product differences among tire manufacturers, tire specifications and dimensions including, but limited to, overall diameter, rolling diameter, tread width, aspect ratio, lug pattern, sidewall construction and inflation pressure, will vary meaningfully by tire and wheel manufacturer. Every tire and wheel combination should be test fit prior to installation. Consult your local installer to learn more about the right tire fitment for your application.

Ride Quality Note: When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 10-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.

Please read Instructions thoroughly and completely before beginning installation. Installation by a certified mechanic is recommended.

Estimated Installation Time: 6.5 Hours +/- 1 hour (excluding alignment and wheel/tire assembly)

View Instruction Sheet

· 4" Lift Springs
· Falcon 2.1 Monotube Front and Piggyback Rear Shocks
· Track Bar Relocation Bracket
· Radius Arm
· Dual Steering Stabilizer
· Sway Bar Drops
· Bump Stop Extensions
· Carrier Bearing Drop
· Front Brake Line Brackets
· Fabricated Rear Lift Blocks
· Hardware Pack

Local pickup welcome.

Some vehicles may require additional modifications or parts.

Guaranteed Fitment.

Questions Call us at (888) 814-1158