This 4.5" System for the 2005-2007 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 the 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 ICON's patented Adjustable Track bar giving the front end of these trucks perfect track alignment.