A 5.3 has 16 roller lifters. This is because it incorporates a cylinder head gasket set, 16 roller lifters, and all-new head bolts. Roller lifters are the little hardware components that connect valves to the camshaft. Roller lifters maintain the position of the valves and guarantee that they open and close properly. In addition, they are responsible for regulating the lift, which is the amount of time the valves are open. Without roller lifters, the engine’s valves could not open and close properly, resulting in misfiring. Therefore, it is essential that the correct amount of roller lifters be placed in the 5.3 engine.