Yes, the 6.7 Cummins does have lifters. The lifters are located in the cylinder head and act on the valves to open and close them. There are two types of lifters used in the 6.7 Cummins: hydraulic and solid. The hydraulic lifters are filled with oil to cushion the valvetrain and reduce noise. The solid lifters require more frequent adjustment, but they offer better performance and durability.