The ICON 2.5” suspension system is a great way to level your 4WD 2005-2016 Ford F250/350 Super Duty while improving ride quality and performance. This Stage 2 system is great for towing, rough construction site terrains, and country dirt roads all while keeping a smooth highway feel. ICON's Stage 2 System is comprised of dual rate coil springs, alignment cams for adding caster, and ICON 2.5 Aluminum Series piggyback reservoir shocks up front and 2.0 Aluminum Series internal reservoir shocks in the rear. ICON 2.5" reservoir shocks up front ensure optimum performance by increasing the duration of consistent damping regardless of situation, keeping the shocks at a cooler operating temperature during heavy use. With the endless hours ICON has spent testing and tuning our suspension components and shocks as a complete package, you can rest assured you have the best suspension solution on the market.