Hot Racing optional aluminum shock upgrade kit for the Traxxas X-Maxx 6S and 8S; including bleeder caps, spring collars, and spring retainers features: - CNC Machined aluminum construction, Anodized black - secondarily processed machined beveled edges - bleeder screws for easy shock maintenance - collars with O-Rings to prevent unwanted adjustments - shock caps include O-Rings to setup the shock as an optional emulsion shock - fits stock shocks without modification you will receive: - two (2) aluminum bleeder shock caps - two (2) shock cap O-rings (used to setup shocks as emulsion shocks - see comments below) - two (2) aluminum spring Adjusters/collars - two (2) aluminum spring seats/cups requirements: - kit completes two shocks; two kits required to equip entire vehicle comments: - shocks can be setup as bladder shocks by using the stock bladders (included O-Rings not used) or as emulsion shocks by using the included O-Rings (bladders not used) - Replaces stock Traxxas shock components from Traxxas 7764 and 7767