Comp Cams Stage 2 LST (58x) 233/247 Hydraulic Roller Master Kit for GM LS 3-Bolt Blower EnginesPerfect choice for upgraded GM LS engines with larger displacement or larger blower Applications that include more Serious additional modifications for higher RPM and more power. The MK Kit (Cam Kit) includes: Camshaft, lifters, timing set, Pushrods, dual valve springs, tool Steel retainers, valve locks, spring seats and valve Seals.