New Addition to the Cummins ISX/QSX Engine Gasket Family, Intake Valve Stem Seal B46021 or OEM #4026660 and Exhaust Valve Stem Seal B46022 or OEM #4026791.

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MAHLE Clevite Inc is announcing the newest addition to the Cummins ISX/QSX Engine Gasket Family.

Introducing Intake Valve Stem Seal B46021 matching OEM #4026660 and Exhaust Valve Stem Seal B46022 matching OEM #4026791.

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