Muncie M20 M21 M20 Gasket, Seal and Bushing Kit for the 27 Spline Shaft This is item includes: (1) Complete Muncie Gasket Set, (1) Rear Extension Housing Bushing for the 27 Spline Shaft, (1) Rear Seal, (1) Speedo O-ring and (3) Lever Seals. If you need anything else for your Muncie rebuild; Complete Rebuild kit, Gears, spring and keys please see our store!