4 inch Coil Spring Lift Kit with Falcon Shocks & Radius Arms

Features:

• 4" lift fits up to 37" tires
• Designed for 2017–2022 F250/F350 diesel 4WD
• Includes front and rear Falcon 1.1 shocks
• Heavy-duty tubular radius arms correct geometry
• Coil springs improve ride and suspension travel
• Radius arms allow extra tire clearance
• Track bar bracket realigns front axle position
• Rear lift blocks maintain proper rake
• Allows bolt-on installation with no cutting
• Built for daily use and off-road driving
• Great balance between lift and drivability
• Maintains smooth ride with added ground clearance

Make Your Super Duty Look And Feel Just Right

If you're looking to lift your 2017-2022 F250 or F350 Super Duty the smart way, the ReadyLift 49-27421 4" Coil Spring Lift Kit delivers both the stance and the ride to match. With this kit, your truck gains the clearance to run up to 37-inch tires, all while keeping a ride quality that still feels smooth and composed on the road. The included Falcon 1.1 Monotube shocks soak up rough terrain while staying comfortable during your everyday drive. Whether you're towing heavy loads or just want to upgrade your presence on the road, this kit balances rugged performance with reliable drivability. The added ground clearance is great for off-road trips, but it also makes daily tasks like job site work or pulling into steep driveways feel easier. Plus, those heavy-duty radius arms don’t just look tough, they improve handling and offer more room for larger tires. If you’re aiming for that perfect combination of form and function, this kit gives your Super Duty the boost it deserves.

Built To Handle Real Work With Precision And Strength

The ReadyLift 49-27421 kit is engineered for 2017-2022 Ford F250 and F350 4WD trucks equipped with the 6.7L Powerstroke diesel engine. At its core are specially designed coil springs and radius arms that correct suspension geometry and support increased wheel travel. This setup is reinforced with a track bar relocation bracket and fabricated rear lift blocks to ensure axle alignment stays tight and consistent. The Falcon 1.1 Monotube shocks provide steady damping performance whether you're on backroads or highway pavement. The kit also includes sway bar drops, bump stop extensions, a carrier bearing drop, and brake line brackets, all of which help maintain factory-like handling and control. The radius arms are bent inward to maximize tire clearance, which is why this system supports up to 37-inch tires on a 9-inch wide wheel with a 0 offset. This isn’t just a lift for looks, it’s a well-rounded system designed to keep your Super Duty working hard while riding smooth.

Fits: 2017, 2018, 2019, 2020, 2021, 2022 Ford F250/F350 Super Duty 6.7L Powerstroke 4WD

Notes:

• Fits 2017–2022 Ford F250/F350 4WD with 6.7L diesel engine.
• Not compatible with gas trucks, 2WD, or dually setups.
• Tremor models may not gain full 4 inches of lift.
• Single cab trucks have not been test-validated for fitment.
• Ride height on 2017–2019 models may be slightly lower.
• Designed for use with up to 37" tires on 9" wheels with 0 offset.
• Not recommended for use on Tremor or gas models due to geometry differences.
• Wheel and tire fitment should always be test-fitted before installation.
• Larger aftermarket tires may affect ride comfort and increase component wear.
• Changes in tire construction (e.g., ply rating) can impact suspension feel.