Sierra International 18-5260 Marine Tune Up Kit for OMC Sterndrive/Cobra Stern Drive Sierra Impeller Meets or exceeds the original equipment quality Sierra part number: 18-3006 Interchangeable with the following: GLM 89480, Evinrude/Johnson 775521, 378891, Mallory 9-45217 and 9-45222 Fit specific, check part numbers to ensure proper fit