1998-2000 Ford F-150, Mustang, E-150 Econoline, E-250 3.8L, 3.9L, 4.2L V6 VIN Codes 2, 4, 6 Multi-layered steel (MLS) Head Gasket Set Multi-layered steel (MLS) head gasket - Silicone Sealant Intake manifold gasket Exhaust manifold gasket Valve cover gasket Viton valve stem seals