Sierra 18-3876 GM 5.0L/5.7L Marine Head Gasket

Sierra 18-3876 is a marine head gasket for GM 305 CID 5.0L and 350 CID 5.7L engine applications used in MerCruiser, OMC, and related marine service contexts. Confirm engine family, cylinder head, and service-manual gasket requirements before installation.

Sierra 18-3876 GM 5.0L/5.7L Marine Head Gasket is listed in the Laken Water Sports marine parts catalog for online ordering and Phoenix-area pickup. Confirm fitment, availability, and pickup timing with the parts team before ordering when compatibility is critical.

Fitment notes: Head gasket; verify GM marine engine application and service manual.