Sierra 18-3016-1 Impeller KitFor Use On Late-Model Bravos & High Performances. Sierra replacement engine parts are manufactured to meet or exceed OEM requirements.Features: Includes gasket; Includes O-Ring; Use with 18-3160-1 Sea Water Pump; Fits: MCM 4.5L MPI; 2000 & newer MCM V-6 &V-8 (305, 350 & 496) engines with the brass sea water pumpInterchangeable with: Quicksilver; 47-8M0104229; Mallory; 9-45310; 9-45310-10; MerCruiser Stern Drive; 47-862232A2;