This ICON Vehicle Dynamics 4.5” suspension system is a great way to lift your 4WD 2017-2019 Ford F250/350 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 hardcore off-road adventure. ICON's Stage 4 System is comprised of dual rate coil springs, adjustable track bar, 5" block kit, and ICON CDC Valve 2.5 Aluminum Series front and rear piggyback reservoir shocks.