Sierra 18-3150 comes Complete with NEW 1-Piece Plastic Housing, Impeller, Stainless Steel Plate, O-Rings and Bolts Sierra Impellers are molded to maintain high quality standards and have been inspected and tested for proper bonding and performance Exact fit minimizes labor required for installation. All components are manufactured from premium materials and held to stringent quality standards to ensure long lasting performance Replaces: Mercury/MerCruiser Stern Drive 46-807151A14, 807151A7 and GLM 12088 All Sierra parts qualify for and are covered under Sierra's Industry Leading Customer Satisfaction Warranty Fit type: Universal Fit