Owners of Specialized bikes equipped with Future Shock suspension may wish to eliminate the suspension cartridge due to degradation of the original cartridge or a desire to reduce the bike's weight. The FSD Kit (available in the web store) is an engineered and tested rigid insert meant to eliminate the future shock cartridge and retain a completely factory look.
It's 142 grams lighter than the Future Shock 1.5 and 185 grams lighter than the Future Shock 2.0. Check out the video below for more information.