COMP Cams Valve Springs, Retainers 26906CS-KIT LS6+ Beehive Valve Spring Kit w/ Chromemoly Steel Retainers; 0.580" Max Lift Including our LS6+ Beehive Valve Springs, hardened spring seats, viton valve seals and machined steel locks and chromemoly steel retainers, this kit is a great way to freshen up LS heads. Allows for a maximum of 0.580" valve lift. COMP Cams LS6+ Beehive Valve Spring Kit w/ Chromemoly Steel Retainers; 0.580in Max Lift