Premium Replacement Rotor for Mercruiser Inboard Engines with TEI IgnitionThis rotor fits GM (V8) 5.0, 5.7, and 7.4L engines with Mercruiser Thunderbolt Electronic Ignition.Replaces:MERCRUISER Rotor 13524A1MERCRUISER Rotor13524A3MERCRUISERRotor13524A5MERCRUISERRotor13524T1MERCRUISERRotor19405A3MERCRUISERRotor90576A2SIERRA Rotor18-5431CDI ELECTRONICS Rotor E65-0009*ARCO Assurance 12-month part and labor warranty protectionThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.