Seal the component joint to prevent oil or engine fluids from leaking. Cummins primarily uses it for 11-liter M11 engines, but it is also installed in L10, ISM, and QSM engines.
To confirm the exact application, you should check the motor’s ESN/CPL, as it may vary depending on the configuration.
It is located between the cylinder head and the exhaust manifold; it prevents exhaust gases from escaping.
Cummins specifies the primary use for 10-liter L10 engines; aftermarket catalogs extend the application to the M11, ISM, and QSM families. Final compatibility should be verified using the engine’s serial number.