MLS head gaskets require cylinder head and cylinder block resurfacing on older engines to ensure proper sealing; consequently, MLS head gasket did not supersede the old composite head gasket.
MLS head gaskets require cylinder head. MLS head gaskets require cylinder block. These cylinder head and cylinder block are resurfacing on older engines. This is to ensure proper sealing. MLS head gasket did not supersede the old composite head gasket. This was consequently.