According to an article in "Engine Professional" publication in 2015, the MLS (Multi Layered Steel) cylinder head gasket is first introduce in the year 1991, which is installed in a Ford 4.6L OHV V8 engine, and in the year 2014, most of the newly develop engine is using MLS cylinder head gasket.
Interestingly when manufacturer is recognize the MLS gasket sealing efficiency, some area their mechanic still looking for a graphite material of cylinder head gasket for the after market use, even tough the original head gasket material is MLS.
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