Sierra 18-0418 Exhaust Manifold Mounting Gasket The Sierra 18-0418 Exhaust Manifold Mounting Gasket is interchangeable with the following: Barr CHVA470000, MC47-27-46820, Crusader 96653, GLM 33760, Mallory 9-61400, Mercruiser 27-46820, OMC 909613, 3852472, Osco CW-GH, Volvo Penta 3852472. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Exhaust Manifold Mounting Gasket Meets or exceeds the original equipment quality Sierra part number: 18-0418 Interchangeable with the following: Barr CHVA470000, MC47-27-46820, Crusader 96653, GLM 33760, Mallory 9-61400, Mercruiser 27-46820, OMC 909613, 3852472, Osco CW-GH, Volvo Penta 3852472