Wiseco W6292 SC Gasket - B18 A/B B20 85mm GasketWiseco W6292 SC Gasket B18 A B B20 85mm Gasket Wiseco sport compact MLS head gaskets use a high pressure steel laminate design to withstand extremely high sheer forces that occur between an aluminum head and iron block. Internal embossments expand with heat to create a better seal when under extremely high combustion pressures and temperatures, conditions that are present especially in power adder applications.