Oil Pump Mid Plate Kit, 1966-91 AMC, Jeep V-8P N: MPKV8 With the installation of the kit, the oil pump gears ride on steel, not aluminum, for less expansion, and more stabilized pressure. The wear plate has a smaller hole thus limiting oil to the by pass, and pumps more oil into the engine. Stabilizes oil pressure and works whether your bottom oil pump cover is worn or not Extends oil pump gear life by giving them a rock hard surface to ride on Sandwiches between the oil filter adapter and the