Sierra 18-0897 Exhaust Elbow Gasket Sierra Exhaust Elbow Gasket Meets or exceeds the original equipment quality Sierra part number: 18-0897 Interchangeable with the following: Barr MC47-27-41813, GLM 30240, Mallory 9-61413, Mercruiser 27-41813, 27-860233, 27-863724, Osco 8503-GR