A new gasket and plug are included (the plug goes in the top of the pump). A set of 4 studs are included as well to attach a fan clutch to this water pump (when a fan clutch is required). 1959, 1960, 1961, 1962, 1963, 1964, 1965, and 1966 Buick LeSabre, Invicta, Wildcat, and Electra 225 models.