While a Ford 289/302/351W RC gasket is mentioned by some retailers, “RC” does not stand for a specific type of performance head gasket in the same way that “MLS” (Multi-Layer Steel) does. “RC” is more often used to designate a rocker cover gasket. However, some manufacturers like Fel-Pro use model numbers for their race-quality (RC) gaskets. Performance gaskets from brands like Fel-Pro and Cometic are a common choice for high-performance Ford small-block builds.