Progressive Suspension is proud to release their proven Fork Monotube design This version is lowered 1" Enjoy improved front end control and ride comfort by converting your archaic dual damper rod forks to true high performance monotube dampers This kit contains a pair of high performance, gas charged mono-tube fork cartridges complete with a set fork springs Improves resistance to front brake dive Improves cornering and over all front end stability No modifications are required, and replaces most of the internal components Limited lifetime warranty