Sierra’s 18-3871 Head Gasket is designed for use with Mercury 175, XR4, Mag II applications. It is interchangeable with GLM 35890, Mallory 9-63856, and Mercury Marine 27-18786-1, 27-187863, 27-18786T. Each Sierra product meets or exceeds the original equipment part it replaces.
Designed for use with Mercury 175, XR4, Mag II applications
Interchangeable with GLM 35890, Mallory 9-63856, and Mercury Marine 27-18786-1, 27-187863, 27-18786T
Includes one gasket per package
Each Sierra product meets or exceeds the original equipment part it replaces
