Sierra 18-6066A Mercruiser Anode Sierra Marine aftermarket engine parts are designed to meet or exceed OEM requirements. For RMRAlpha One Sterndrive Transom Assembly 1983-1990 Material Aluminum Interchangeable with Mercruiser Stern Drive 43994A2 821631A1 821631B1 97-821631C 97-821631Q1 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type DONOTSEND Wiser Yes Product MPN 18-6066A Product UPC 808282175931