The 2020-2022 Super Duty trucks sit at a lower ride height than 2017-2019 models, and although many of the 2017-2019 components will physically fit 2020-2022 models, the resulting ride height is often taller than desired. So, engineers at ICON designed new progressive rate coil springs that achieve the correct advertised lift heights while still retaining the great ride quality, predictability, and performance that our Super Duty systems are known for. This ICON Vehicle Dynamics 2.5” suspension system is a great way to level your 4WD 2020-2022 F-250/F-350 Super Duty while drastically improving ride quality and performance. The Stage 4 system is perfect for on-road and off-road use including towing, job site duty, and spirited off-road adventure. ICON's Stage 4 System combines dual rate coil springs optimized for trucks equipped with diesel engines, alignment cams, ICON CDC Valve 2.5 Aluminum Series front remote reservoir and rear piggyback reservoir shocks, and an all-new adjustable track bar designed specifically for the 2017-2023 Super Duty. With the endless hours ICON has spent testing and tuning our suspension components and shocks as a complete package, you can be rest assured you have the best suspension solution on the market.