2023-2024 Powerstroke 4" Coil Spring Suspension System W/ Falcon Max3.3 Shocks & Radius Arms (43-23440)

Fits

This 4" Coil Spring Kit comes with Tubular Radius Arms, Falcon Dual Steering Stabilizer, and the new Falcon 3.3 piggyback shocks, making it the go-to option for truck owners looking to fit larger tires. With increased ground clearance, impressive tire options, and a head-turning stance, this lift height is widely considered the "sweet spot" for maximum tire size while still being practical for everyday use.

Improved Radius Arms - specially designed to correct the lifted suspension geometry for lifted model trucks! These heavy-duty arms can handle all the abuse you'll put them through, and even outperform the factory arms and support gussets. Plus, their inward curve allows for extra tire space and easy installation. Time to upgrade to these bad boys!

ReadyLIFT's innovative Dual Steering Stabilizer features top-of-the-line Falcon steering dampers will help you conquer even the toughest roads and terrains. When equipped with oversized tires, it provides superior stability and minimizes bump steer, giving you more control and comfort on your ride. 

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 Superduty ride and handling are the new, specially engineered coil springs teamed with Falcon 3.3 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.

Thanks to a killer combo of specially engineered coil springs, Falcon 3.3 shocks, and a track bar relocation bracket. Forget about just lifting your ride, this performance-enhancing kit will have you grinning from ear to ear whether you're hitting the pavement or the trails!

Part Number: 43-23440

•  4" Coil Spring Lift Kit with Vehicle-specific performance-tuned Falcon Shocks.        
• Tubular Radius Arms help to correct the caster angle in         
• Falcon Dual Steering Stabilizer         
• 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 3.3 monotube dampers on all four corners.
• 3.3 Fast Adjust Dampers offer a wide range of adjustability for specific terrain and/or handling characteristics with two separate knobs to tune to your preference.
• 3-Position Fast Adjust Knob for Soft, Custom, and Firm Compression. Soft mode allows a partial bypass of the main piston for a softer ride
• 8-Position Micro Adjust Dial offers refined damping adjustments
• Reservoir design increases nitrogen to oil ratio for consistent damping over wide temperature ranges.
• Hard Anodized Large Bore 6061-T6 Aluminum Shock Body for impact and corrosion resistance as well as increased oil volume for consistent performance.
• VOD (Volume Optimized Damping) features a digressive linear piston for quicker ramp-up for reduced body roll and an overall increase in damping to reduce bottom out when pushed to the limit.
• Red Line high VI shock oil for consistent performance across all temperatures from -50F to 450F with anti-wear and lubricity agents.

Includes:

• 4" Lift Springs
• Falcon 3.3 Monotube Front and 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

• Estimated Install Time: 6.5 Hours +/- 1 Hours  (excluding alignment and wheel/tire assembly) 
• Click Here

Notes:

Installation Alignment Note:  Your vehicle may require alignment after product installation. You may incur additional costs to align the vehicle.

Installation Headlamp Aim Note:  In addition to your vehicle alignment, for your safety and others, it is necessary to check and adjust your vehicle headlamps for proper aim and alignment after product installation.  You may incur additional costs to adjust the headlamp system.

 Installation Advanced Driver Assistance Systems (ADAS) Note:  If your vehicle is equipped with active or passive safety/collision monitoring and/or assistance/avoidance systems including, but not limited to, camera- or radar/sonar-based systems, check and adjust your vehicle’s systems for proper aim and function after product installation.   In some instances, your vehicle may require OEM dealer service tools and factory-trained technicians to re-calibrate ADAS.  You may incur additional costs to adjust ADAS systems.

SAEJ2492 WARNING: By installing this product, you acknowledge that the suspension of this vehicle has been modified. As a result, this vehicle may handle differently than factory-equipped vehicles. As with any vehicle, extreme care must be used to prevent loss of control or rollover during sharp turns or abrupt maneuvers. Always wear seat belts, and drive safely, recognizing that reduced speeds and specialized driving techniques may be required. Failure to drive this vehicle safely may result in serious injury or death. Do not drive this vehicle unless you are familiar with its unique handling characteristics and are confident of your ability to maintain control under all driving conditions. Some modifications (and combinations of modifications) are not recommended and may not be permitted in your state. Consult your owner's manual, the instructions accompanying this product, and state laws before undertaking these modifications. You are responsible for the legality and safety of the vehicle you modify using these components.

• Trucks equipped with the "Onboard Scale" option will require the Auto-Leveling Headlight Bracket.
• Part Number: 67-23610 Ford Superduty Auto-Leveling Headlinght Bypass Bracket Kit. 
• 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.  

Tire Fitment

• 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.