An engine intake manifold gasket set seals the intake manifold to the cylinder heads. On many V-engines it also seals coolant passages, so a failure can cause both vacuum and coolant leaks.
Use the Evergreen eCatalog to look up the correct engine intake manifold gasket set by vehicle or engine. Always verify the part number and application before ordering. Evergreen sells through authorized wholesale distributors; see where to buy or become a wholesale partner.