1979-1986 GMC K2500 Suburban 5.7L V8. 1979-1980 GMC K2500 Suburban 6.6L V8. Contents: Contains Intake Manifold Gaskets, Intake Manifold End Seals, Distributer Mounting Gaskets, RTV. Notes: Engine Intake Manifold Gasket Set -- Contains one crossover restrictor; Composite.