This 4.5" System for the 2008-2010 Super Duty’s is one the best riding suspension systems ICON has ever developed. This system has been engineered using the highest quality materials and components. The front Dual-Rate coils-springs combined with our ICON Series Mono-tube shocks give these trucks the performance they so desperately need. This system comes complete with front coils, shocks, radius arm drop down brackets, rear blocks and u-bolts and our patented Adjustable Track bar with upgraded bearing giving the front end of these trucks perfect track alignment. The stage 4 system upgrades the front and rear shocks to our 2.5" Omega Series Modular Bypass shocks for on vehicle adjsutment of rebound and compression. The stage 4 system also includes our 4 - Link kit as well as our dual opposed steering stabilizer kit and shocks. This system is the ultimate in shock technology and suspension technology.