DescriptionGSC Power-Division Valve Keeper (Lock) Set for Mitsubishi 4G63T. Comes as a set for 16 locks (32 pieces) Suitable for all GSC Power-Division valve spring and retainer kits, as well as the OEM as an alternative to expensive dealership parts. New keepers are recommended anytime the valves are replaced for proper fitment in the valve groove to allow for rotation and stability for the valve train.