This SWORKz factory replacement differential case set is designed for the S12 series platform and is built from pro-composite carbon-reinforced material. The set includes the main diff case housing, the diff case cover, and a gasket. It is a direct-fit upgrade or replacement for the S12 series differential assembly, keeping the drivetrain running smoothly and correctly sealed. Features: Pro-composite carbon-reinforced construction Includes main case, cover, and gasket Factory replacement fit for S12 series differentials 7/7/26 cs