Like any application that makes its way into ICON's research and development department, the Ford Expedition was examined thoroughly in stock form in an attempt to find where the OE components were limiting performance or could be improved upon. After hours of in-house R&D and thousands of miles of real-world testing a collection of ICON components including front and rear coilovers and upper control arms were organized into two staged suspension systems that each delivers a unique level of performance to the Expedition. A remarkable level of performance is established with the 2.5 Series remote reservoir CDC Valve shocks included in ICON's Stage 1 system, and only improves with the addition of upper control arms (tubular steel or billet aluminum) in the Stage 2 systems. These systems drastically increase the vehicle's ride quality, reduce body roll, maximize wheel travel, and provide a lift height range of .75-2.25" to allow for the fitment of larger, more aggressive wheel and tire combinations. A bolt-on design also makes for an easy install with the ability for the vehicle to be returned to stock if needed.