Upper Gasket Kit 4089478 for Cummins Engine L10 M11 ISM QSM11 Hyundai R450LC-7
Cummins 4089478 is an upper engine gasket set for L10, M11, and ISM/QSM 11-liter engines manufactured in 1991 and later. It typically includes cylinder head gaskets, intake/exhaust manifold gaskets, valve cover gaskets, and various O-rings/seals.
Description
Key Specifications and Features
Part Number: 4089478 (often listed as DS-4089478 or M-4089478) Engine Compatibility: Cummins L10 (1991 STC and Celect), M11, ISM, and QSM11
Type: Upper Engine/Cylinder Head Gasket Set
Included Components:
Cylinder head gasket
Intake and exhaust manifold gaskets
Rockarm cover/valve cover gasket, turbocharger gasket and oil return gasket, various O-rings, washers, and seals
Replacements/Alternatives: DS-4024993, DS-4025157, DS-3803293
















